Add syntax highlighting for TOML

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

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

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

@@ -0,0 +1,9 @@
+name = "TOML"
+path_suffixes = ["toml"]
+line_comment = "# "
+autoclose_before = ",]}"
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "\"", end = "\"", close = true, newline = false },
+]

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

@@ -0,0 +1,33 @@
+; 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
+"," @punctuation.delimiter
+
+"=" @operator
+
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+"[[" @punctuation.bracket
+"]]" @punctuation.bracket
+"{" @punctuation.bracket
+"}" @punctuation.bracket

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

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