feat(languages): Support markdoc (#6432)

Add basic support for [markdoc](https://markdoc.dev/).

For language server, see: https://github.com/markdoc-extra/markdoc-ls
For tree sitter, see: https://github.com/markdoc-extra/tree-sitter-markdoc

book/src/generated/lang-support.md

@@ -81,6 +81,7 @@
 | llvm-mir-yaml | ✓ |  | ✓ |  |
 | lua | ✓ | ✓ | ✓ | `lua-language-server` |
 | make | ✓ |  |  |  |
+| markdoc | ✓ |  |  | `markdoc-ls` |
 | markdown | ✓ |  |  | `marksman` |
 | markdown.inline | ✓ |  |  |  |
 | matlab | ✓ |  |  |  |

languages.toml

@@ -2461,3 +2461,14 @@ indent = { tab-width = 2, unit = "  " }
 [[grammar]]
 name = "hurl"
 source = { git = "https://github.com/pfeiferj/tree-sitter-hurl", rev = "264c42064b61ee21abe88d0061f29a0523352e22" }
+
+[[language]]
+name = "markdoc"
+scope = "text.markdoc"
+roots = []
+file-types = ["mdoc"]
+language-server = { command = "markdoc-ls", args = ["--stdio"] }
+
+[[grammar]]
+name = "markdoc"
+source = { git = "https://github.com/markdoc-extra/tree-sitter-markdoc", rev = "5ffe71b29e8a3f94823913ea9cea51fcfa7e3bf8" }

runtime/queries/markdoc/highlights.scm

@@ -0,0 +1,16 @@
+tag_name: (identifier) @tag
+(tag_self_closing "/" @tag)
+(tag_close "/" @tag)
+([(tag_start) (tag_end) "="] @tag)
+(attribute [key : (identifier)] @attribute)
+(attribute [shorthand : (identifier)]  @attribute)
+(variable [variable : (identifier) (variable_sigil)] @variable)
+(variable_tail property : (identifier) @variable.other.member)
+(function function_name : (identifier) @function)
+(function_parameter_named parameter : (identifier) @variable.parameter)
+
+(hash_key key: (identifier) @variable.other.member)
+(string) @string
+(number) @constant.numeric
+(boolean) @constant.builtin.boolean
+(null) @constant.builtin

runtime/queries/markdoc/injections.scm

@@ -0,0 +1,2 @@
+((markdown) @injection.content
+ (#set! injection.language "markdown"))