Add http Support

It's like [vscode-restclient](https://github.com/Huachao/vscode-restclient)

- https://github.com/erasin/tree-sitter-http/tree/main/tests

book/src/generated/lang-support.md

@@ -59,6 +59,7 @@
 | heex | ✓ | ✓ |  | `elixir-ls` |
 | hosts | ✓ |  |  |  |
 | html | ✓ |  |  | `vscode-html-language-server` |
+| http | ✓ |  |  |  |
 | idris |  |  |  | `idris2-lsp` |
 | iex | ✓ |  |  |  |
 | ini | ✓ |  |  |  |

languages.toml

@@ -2421,3 +2421,17 @@ language-server = { command = "nimlangserver" }
 [[grammar]]
 name = "nim"
 source = { git = "https://github.com/aMOPel/tree-sitter-nim", rev = "240239b232550e431d67de250d1b5856209e7f06" }
+
+[[language]]
+name = "http"
+scope = "source.http"
+injection-regex = "http"
+file-types = ["http"]
+roots = []
+comment-token = "#"
+indent = { tab-width = 2, unit = "  " }
+
+[[grammar]]
+name = "http"
+source = { git = "https://github.com/erasin/tree-sitter-http", rev = "3dc1385ab2d4ce97eb583ced6e962fff8f407830" }
+

runtime/queries/http/highlights.scm

@@ -0,0 +1,43 @@
+; Comments
+(comment) @comment
+
+(method) @keyword
+
+(target_url) @string.special.url
+(host) @string.special.url
+(path) @string.special.path
+(scheme) @keyword
+
+(http_version) @keyword
+
+(authority
+  (pair
+    name: (_) @info
+    value: (_) @warning))
+
+(pair
+  name: (_) @attribute
+  value: (_) @string)
+
+(query_param 
+  key: (key) @attribute
+  value: (value) @string)
+
+(header
+  name: (name) @constant
+  value: (value) @string)
+
+(external_body
+  file_path: (path) @string.special.path) @keyword
+
+(number) @constant.numeric
+(string) @string
+(variable) @variable.other.member
+(variable_declaration 
+  identifier: (identifier) @variable)
+
+[
+  "@"
+  ":"
+  "="
+] @operator

runtime/queries/http/injections.scm

@@ -0,0 +1,8 @@
+((comment) @injection.content
+  (#set! injection.language "comment"))
+
+((json_body) @injection.content
+  (#set! injection.language "json"))
+
+((xml_body) @injection.content
+  (#set! injection.language "xml"))