Extract GLSL language support into an extension (#10433)

Release Notes:

- Extracted GLSL language support into an extension.

---------

Co-authored-by: Marshall <marshall@zed.dev>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/extensions_ui/src/extension_suggest.rs

@@ -39,6 +39,8 @@ fn suggested_extensions() -> &'static HashMap<&'static str, Arc<str>> {
             ("git-firefly", "TAG_EDITMSG"),
             ("git-firefly", "git-rebase-todo"),
             ("gleam", "gleam"),
+            ("glsl", "vert"),
+            ("glsl", "frag"),
             ("graphql", "gql"),
             ("graphql", "graphql"),
             ("haskell", "hs"),