Add support for auto surround (#13217)

![result](https://github.com/zed-industries/zed/assets/32017007/c400081f-be5d-48fa-994f-90a00e2be359)

In the past, Zed used a single switch called `autoclose` to control both
`autoclose` and `auto_surround` functionalities:
+ `autoclose`: when input '(', append ')' automatically.
+ `auto_surround`: when select text and input '(', surround text with
'(' and ')' automatically.

This PR separates `auto_surround` from `autoclose` to support `<`. 

Previously, if `autoclose` of `<` was set to `false`, `auto_surround`
couldn't be used. However, setting `autoclose` to `true` would affect
the default behavior of simple expression. For example, `a < b` would
become `a <> b`.

For more information, see #13187.

Fix #12898.

Release Notes:

- Added support for `auto_surround`
([#12898](https://github.com/zed-industries/zed/issues/12898)).

crates/language/src/language.rs

@@ -61,6 +61,7 @@ use task::RunnableTag;
 pub use task_context::{ContextProvider, RunnableRange};
 use theme::SyntaxTheme;
 use tree_sitter::{self, wasmtime, Query, QueryCursor, WasmStore};
+use util::serde::default_true;
 
 pub use buffer::Operation;
 pub use buffer::*;
@@ -803,6 +804,9 @@ pub struct BracketPair {
     pub end: String,
     /// True if `end` should be automatically inserted right after `start` characters.
     pub close: bool,
+    /// True if selected text should be surrounded by `start` and `end` characters.
+    #[serde(default = "default_true")]
+    pub surround: bool,
     /// True if an extra newline should be inserted while the cursor is in the middle
     /// of that bracket pair.
     pub newline: bool,