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/clojure/brackets.scm

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

crates/languages/src/clojure/config.toml

@@ -0,0 +1,12 @@
+name = "Clojure"
+grammar = "clojure"
+path_suffixes = ["clj", "cljs"]
+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 = ["string"] },
+]
+word_characters = ["-"]

crates/languages/src/clojure/highlights.scm

@@ -0,0 +1,41 @@
+;; Literals
+
+(num_lit) @number
+
+[
+  (char_lit)
+  (str_lit)
+] @string
+
+[
+ (bool_lit)
+ (nil_lit)
+] @constant.builtin
+
+(kwd_lit) @constant
+
+;; Comments
+
+(comment) @comment
+
+;; Treat quasiquotation as operators for the purpose of highlighting.
+
+[
+ "'"
+ "`"
+ "~"
+ "@"
+ "~@"
+] @operator
+
+
+(list_lit
+  .
+  (sym_lit) @function)
+
+(list_lit
+  .
+  (sym_lit) @keyword
+  (#match? @keyword
+    "^(do|if|let|var|fn|fn*|loop*|recur|throw|try|catch|finally|set!|new|quote|->|->>)$"
+    ))

crates/languages/src/clojure/indents.scm

@@ -0,0 +1,3 @@
+(_ "[" "]") @indent
+(_ "{" "}") @indent
+(_ "(" ")") @indent

crates/languages/src/clojure/outline.scm

@@ -0,0 +1 @@
+