Extract Elm language into an extension (#10432)

Release Notes:

- Extracted Elm language support into an extension

Co-authored-by: Marshall <marshall@zed.dev>

Cargo.lock

@@ -5429,7 +5429,6 @@ dependencies = [
  "tree-sitter-cpp",
  "tree-sitter-css",
  "tree-sitter-elixir",
- "tree-sitter-elm",
  "tree-sitter-embedded-template",
  "tree-sitter-glsl",
  "tree-sitter-go",
@@ -10343,15 +10342,6 @@ dependencies = [
  "tree-sitter",
 ]
 
-[[package]]
-name = "tree-sitter-elm"
-version = "5.6.4"
-source = "git+https://github.com/elm-tooling/tree-sitter-elm?rev=692c50c0b961364c40299e73c1306aecb5d20f40#692c50c0b961364c40299e73c1306aecb5d20f40"
-dependencies = [
- "cc",
- "tree-sitter",
-]
-
 [[package]]
 name = "tree-sitter-embedded-template"
 version = "0.20.0"
@@ -12587,6 +12577,13 @@ dependencies = [
  "zed_extension_api 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "zed_elm"
+version = "0.0.1"
+dependencies = [
+ "zed_extension_api 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "zed_emmet"
 version = "0.0.2"