chore: Extract languages from zed crate (#8270)

- Moves languages module from `zed` into a separate crate. That way we
have less of a long pole at the end of compilation.
- Removes moot dependencies on editor/picker. This is totally harmless
and might help in the future if we decide to decouple picker from
editor.

Before:
```
Number of crates that depend on 'picker' but not on 'editor': 1
Total number of crates that depend on 'picker': 13
Total number of crates that depend on 'editor': 30
```
After:
```
Number of crates that depend on 'picker' but not on 'editor': 5
Total number of crates that depend on 'picker': 12
Total number of crates that depend on 'editor': 26
```
The more crates depend on just picker but not editor, the better in that
case.

Release Notes:

- N/A

crates/languages/src/ruby/brackets.scm

@@ -0,0 +1,14 @@
+("[" @open "]" @close)
+("{" @open "}" @close)
+("\"" @open "\"" @close)
+("do" @open "end" @close)
+
+(block_parameters "|" @open "|" @close)
+(interpolation "#{" @open "}" @close)
+
+(if "if" @open "end" @close)
+(unless "unless" @open "end" @close)
+(begin "begin" @open "end" @close)
+(module "module" @open "end" @close)
+(_ . "def" @open "end" @close)
+(_ . "class" @open "end" @close)

crates/languages/src/ruby/config.toml

@@ -0,0 +1,40 @@
+name = "Ruby"
+grammar = "ruby"
+path_suffixes = [
+    "rb",
+    "Gemfile",
+    "rake",
+    "Rakefile",
+    "ru",
+    "thor",
+    "cap",
+    "capfile",
+    "Capfile",
+    "jbuilder",
+    "rabl",
+    "rxml",
+    "builder",
+    "gemspec",
+    "rdoc",
+    "thor",
+    "pryrc",
+    "simplecov",
+]
+first_line_pattern = '^#!.*\bruby\b'
+line_comments = ["# "]
+autoclose_before = ";:.,=}])>"
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = true },
+    { start = "\"", end = "\"", close = true, newline = false, not_in = [
+        "comment",
+        "string",
+    ] },
+    { start = "'", end = "'", close = true, newline = false, not_in = [
+        "comment",
+        "string",
+    ] },
+]
+collapsed_placeholder = "# ..."
+word_characters = ["_", "$", "=", "@", "!", ":", "?"]

crates/languages/src/ruby/embedding.scm

@@ -0,0 +1,22 @@
+(
+    (comment)* @context
+    .
+    [
+        (module
+            "module" @name
+            name: (_) @name)
+        (method
+            "def" @name
+            name: (_) @name
+            body: (body_statement) @collapse)
+        (class
+            "class" @name
+            name: (_) @name)
+        (singleton_method
+            "def" @name
+            object: (_) @name
+            "." @name
+            name: (_) @name
+            body: (body_statement) @collapse)
+        ] @item
+    )

crates/languages/src/ruby/highlights.scm

@@ -0,0 +1,182 @@
+; Keywords
+
+[
+  "alias"
+  "and"
+  "begin"
+  "break"
+  "case"
+  "class"
+  "def"
+  "do"
+  "else"
+  "elsif"
+  "end"
+  "ensure"
+  "for"
+  "if"
+  "in"
+  "module"
+  "next"
+  "or"
+  "rescue"
+  "retry"
+  "return"
+  "then"
+  "unless"
+  "until"
+  "when"
+  "while"
+  "yield"
+] @keyword
+
+((identifier) @keyword
+ (#match? @keyword "^(private|protected|public)$"))
+
+; Function calls
+
+((identifier) @function.method.builtin
+ (#eq? @function.method.builtin "require"))
+
+"defined?" @function.method.builtin
+
+(call
+  method: [(identifier) (constant)] @function.method)
+
+; Function definitions
+
+(alias (identifier) @function.method)
+(setter (identifier) @function.method)
+(method name: [(identifier) (constant)] @function.method)
+(singleton_method name: [(identifier) (constant)] @function.method)
+
+; Identifiers
+
+((identifier) @constant.builtin
+ (#match? @constant.builtin "^__(FILE|LINE|ENCODING)__$"))
+
+(file) @constant.builtin
+(line) @constant.builtin
+(encoding) @constant.builtin
+
+(hash_splat_nil
+  "**" @operator
+) @constant.builtin
+
+((constant) @constant
+ (#match? @constant "^[A-Z\\d_]+$"))
+
+(global_variable) @constant
+
+(constant) @type
+
+(self) @variable.special
+(super) @variable.special
+
+[
+  (class_variable)
+  (instance_variable)
+] @variable.member
+
+
+; Literals
+
+[
+  (string)
+  (bare_string)
+  (subshell)
+  (heredoc_body)
+  (heredoc_beginning)
+] @string
+
+[
+  (simple_symbol)
+  (delimited_symbol)
+  (hash_key_symbol)
+  (bare_symbol)
+] @string.special.symbol
+
+(regex) @string.regex
+(escape_sequence) @escape
+
+[
+  (integer)
+  (float)
+] @number
+
+[
+  (nil)
+  (true)
+  (false)
+] @constant.builtin
+
+(comment) @comment
+
+; Operators
+
+[
+  "!"
+  "~"
+  "+"
+  "-"
+  "**"
+  "*"
+  "/"
+  "%"
+  "<<"
+  ">>"
+  "&"
+  "|"
+  "^"
+  ">"
+  "<"
+  "<="
+  ">="
+  "=="
+  "!="
+  "=~"
+  "!~"
+  "<=>"
+  "||"
+  "&&"
+  ".."
+  "..."
+  "="
+  "**="
+  "*="
+  "/="
+  "%="
+  "+="
+  "-="
+  "<<="
+  ">>="
+  "&&="
+  "&="
+  "||="
+  "|="
+  "^="
+  "=>"
+  "->"
+  (operator)
+] @operator
+
+[
+  ","
+  ";"
+  "."
+] @punctuation.delimiter
+
+[
+  "("
+  ")"
+  "["
+  "]"
+  "{"
+  "}"
+  "%w("
+  "%i("
+] @punctuation.bracket
+
+(interpolation
+  "#{" @punctuation.special
+  "}" @punctuation.special) @embedded

crates/languages/src/ruby/indents.scm

@@ -0,0 +1,17 @@
+(method "end" @end) @indent
+(class "end" @end) @indent
+(module "end" @end) @indent
+(begin "end" @end) @indent
+(do_block "end" @end) @indent
+
+(then) @indent
+(call) @indent
+
+(ensure) @outdent
+(rescue) @outdent
+(else) @outdent
+
+
+(_ "[" "]" @end) @indent
+(_ "{" "}" @end) @indent
+(_ "(" ")" @end) @indent

crates/languages/src/ruby/outline.scm

@@ -0,0 +1,20 @@
+(class
+    "class" @context
+    name: (_) @name) @item
+
+((identifier) @context
+  (#match? @context "^(private|protected|public)$")) @item
+
+(method
+    "def" @context
+    name: (_) @name) @item
+
+(singleton_method
+    "def" @context
+    object: (_) @context
+    "." @context
+    name: (_) @name) @item
+
+(module
+    "module" @context
+    name: (_) @name) @item

crates/languages/src/ruby/overrides.scm

@@ -0,0 +1,2 @@
+(comment) @comment
+(string) @string