Add parser and queries for go

Co-authored-by: Antonio Scandurra <me@as-cii.com>

crates/zed/src/languages/go/brackets.scm

@@ -0,0 +1,3 @@
+("[" @open "]" @close)
+("{" @open "}" @close)
+("\"" @open "\"" @close)

crates/zed/src/languages/go/config.toml

@@ -0,0 +1,11 @@
+name = "Go"
+path_suffixes = ["go"]
+line_comment = "// "
+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 },
+    { start = "/*", end = " */", close = true, newline = false },
+]

crates/zed/src/languages/go/highlights.scm

@@ -0,0 +1,107 @@
+(identifier) @variable
+(type_identifier) @type
+(field_identifier) @property
+
+(call_expression
+  function: (identifier) @function)
+
+(call_expression
+  function: (selector_expression
+    field: (field_identifier) @function.method))
+
+(function_declaration
+  name: (identifier) @function)
+
+(method_declaration
+  name: (field_identifier) @function.method)
+
+[
+  "--"
+  "-"
+  "-="
+  ":="
+  "!"
+  "!="
+  "..."
+  "*"
+  "*"
+  "*="
+  "/"
+  "/="
+  "&"
+  "&&"
+  "&="
+  "%"
+  "%="
+  "^"
+  "^="
+  "+"
+  "++"
+  "+="
+  "<-"
+  "<"
+  "<<"
+  "<<="
+  "<="
+  "="
+  "=="
+  ">"
+  ">="
+  ">>"
+  ">>="
+  "|"
+  "|="
+  "||"
+  "~"
+] @operator
+
+[
+  "break"
+  "case"
+  "chan"
+  "const"
+  "continue"
+  "default"
+  "defer"
+  "else"
+  "fallthrough"
+  "for"
+  "func"
+  "go"
+  "goto"
+  "if"
+  "import"
+  "interface"
+  "map"
+  "package"
+  "range"
+  "return"
+  "select"
+  "struct"
+  "switch"
+  "type"
+  "var"
+] @keyword
+
+[
+  (interpreted_string_literal)
+  (raw_string_literal)
+  (rune_literal)
+] @string
+
+(escape_sequence) @escape
+
+[
+  (int_literal)
+  (float_literal)
+  (imaginary_literal)
+] @number
+
+[
+  (true)
+  (false)
+  (nil)
+  (iota)
+] @constant.builtin
+
+(comment) @comment

crates/zed/src/languages/go/indents.scm

@@ -0,0 +1,9 @@
+[
+    (assignment_statement)
+    (call_expression)
+    (selector_expression)
+] @indent
+
+(_ "[" "]" @end) @indent
+(_ "{" "}" @end) @indent
+(_ "(" ")" @end) @indent

crates/zed/src/languages/go/outline.scm

@@ -0,0 +1,26 @@
+(type_declaration
+    "type" @context
+    (type_spec
+        name: (_) @name)) @item
+
+(function_declaration
+    "func" @context
+    name: (identifier) @name) @item
+
+(method_declaration
+    "func" @context
+    receiver: (parameter_list
+        (parameter_declaration
+            type: (_) @context))
+    name: (field_identifier) @name) @item
+
+(const_declaration
+    "const" @context
+    (const_spec
+        name: (identifier) @name)) @item
+
+(source_file
+    (var_declaration
+        "var" @context
+        (var_spec
+            name: (identifier) @name)) @item)