add tree-sitter-iex (#1576)

* add tree-sitter-iex

* run docgen task

* fix url for iex submodule

.gitmodules

@@ -214,3 +214,7 @@
 	path = helix-syntax/languages/tree-sitter-elm
 	url = https://github.com/elm-tooling/tree-sitter-elm
 	shallow = true
+[submodule "helix-syntax/languages/tree-sitter-iex"]
+	path = helix-syntax/languages/tree-sitter-iex
+	url = https://github.com/elixir-lang/tree-sitter-iex
+	shallow = true

book/src/generated/lang-support.md

@@ -21,6 +21,7 @@
 | graphql | ✓ |  |  |  |
 | haskell | ✓ |  |  | `haskell-language-server-wrapper` |
 | html | ✓ |  |  |  |
+| iex | ✓ |  |  |  |
 | java | ✓ |  |  |  |
 | javascript | ✓ |  | ✓ | `typescript-language-server` |
 | json | ✓ |  | ✓ |  |

helix-syntax/languages/tree-sitter-iex

@@ -0,0 +1 @@
+Subproject commit 3ec55082cf0be015d03148be8edfdfa8c56e77f9

languages.toml

@@ -586,3 +586,10 @@ auto-format = true
 comment-token = "--"
 language-server = { command = "elm-language-server" }
 indent = { tab-width = 4, unit = "    " }
+
+[[language]]
+name = "iex"
+scope = "source.iex"
+injection-regex = "iex"
+file-types = ["iex"]
+roots = []

runtime/queries/iex/highlights.scm

@@ -0,0 +1 @@
+(prompt) @comment

runtime/queries/iex/injections.scm

@@ -0,0 +1,6 @@
+((evaluation_block (prompt_line (expression) @injection.content))
+ (#set! injection.language "elixir")
+ (#set! injection.combined))
+
+((result) @injection.content
+ (#set! injection.language "elixir"))