Extract Protocol Buffers support into an extension (#18704)

This PR extracts the Protocol Buffers support into an extension.

Release Notes:

- Removed built-in support for Protocol Buffers, in favor of making it
available as an extension. The Protocol Buffers extension will be
suggested for download when you open a `.proto` file.

Cargo.lock

@@ -6386,7 +6386,6 @@ dependencies = [
  "node_runtime",
  "paths",
  "project",
- "protols-tree-sitter-proto",
  "regex",
  "rope",
  "rust-embed",
@@ -8644,15 +8643,6 @@ version = "2.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
 
-[[package]]
-name = "protols-tree-sitter-proto"
-version = "0.2.0"
-source = "git+https://github.com/zed-industries/tree-sitter-proto?rev=0848bd30a64be48772e15fbb9d5ba8c0cc5772ad#0848bd30a64be48772e15fbb9d5ba8c0cc5772ad"
-dependencies = [
- "cc",
- "tree-sitter-language",
-]
-
 [[package]]
 name = "psm"
 version = "0.1.21"