Extract TOML support into an extension (#9940)

This PR extracts TOML support into an extension and removes the built-in
TOML support from Zed.

There's a small workaround necessary in order for us to set the file
permissions on the `taplo` binary so that it can be run. Eventually
we'll want to build this into the extension API, but for now we're just
hard-coding it on the host side.

Release Notes:

- Removed built-in support for TOML, in favor of making it available as
an extension. The TOML extension will be suggested for download when you
open a `.toml` or `Cargo.lock` file.

extensions/toml/languages/toml/brackets.scm

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

extensions/toml/languages/toml/config.toml

@@ -0,0 +1,11 @@
+name = "TOML"
+grammar = "toml"
+path_suffixes = ["Cargo.lock", "toml"]
+line_comments = ["# "]
+autoclose_before = ",]}"
+brackets = [
+    { 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"] },
+]

extensions/toml/languages/toml/highlights.scm

@@ -0,0 +1,37 @@
+; Properties
+;-----------
+
+(bare_key) @property
+(quoted_key) @property
+
+; Literals
+;---------
+
+(boolean) @constant
+(comment) @comment
+(string) @string
+(integer) @number
+(float) @number
+(offset_date_time) @string.special
+(local_date_time) @string.special
+(local_date) @string.special
+(local_time) @string.special
+
+; Punctuation
+;------------
+
+[
+  "."
+  ","
+] @punctuation.delimiter
+
+"=" @operator
+
+[
+  "["
+  "]"
+  "[["
+  "]]"
+  "{"
+  "}"
+]  @punctuation.bracket

extensions/toml/languages/toml/outline.scm

@@ -0,0 +1,15 @@
+(table
+  .
+  "["
+  .
+  (_) @name) @item
+
+(table_array_element
+  .
+  "[["
+  .
+  (_) @name) @item
+
+(pair
+  .
+  (_) @name) @item

extensions/toml/languages/toml/overrides.scm

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

extensions/toml/languages/toml/redactions.scm

@@ -0,0 +1 @@
+(pair (bare_key) "=" (_) @redact)