Add extensions to the remote server (#20049)

TODO:

- [x] Double check strange PHP env detection
- [x] Clippy & etc.

Release Notes:

- Added support for extension languages on the remote server

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/proto/proto/zed.proto

@@ -295,9 +295,13 @@ message Envelope {
         GetPanicFilesResponse get_panic_files_response = 281;
 
         CancelLanguageServerWork cancel_language_server_work = 282;
-        
+
         LspExtOpenDocs lsp_ext_open_docs = 283;
-        LspExtOpenDocsResponse lsp_ext_open_docs_response = 284; // current max
+        LspExtOpenDocsResponse lsp_ext_open_docs_response = 284;
+
+        SyncExtensions sync_extensions = 285;
+        SyncExtensionsResponse sync_extensions_response = 286;
+        InstallExtension install_extension = 287; // current max
     }
 
     reserved 87 to 88;
@@ -2544,3 +2548,23 @@ message CancelLanguageServerWork {
         optional string token = 2;
     }
 }
+
+message Extension {
+    string id = 1;
+    string version = 2;
+    bool dev = 3;
+}
+
+message SyncExtensions {
+    repeated Extension extensions = 1;
+}
+
+message SyncExtensionsResponse {
+    string tmp_dir = 1;
+    repeated Extension missing_extensions = 2;
+}
+
+message InstallExtension {
+    Extension extension = 1;
+    string tmp_dir = 2;
+}

crates/proto/src/proto.rs

@@ -368,6 +368,9 @@ messages!(
     (GetPanicFiles, Background),
     (GetPanicFilesResponse, Background),
     (CancelLanguageServerWork, Foreground),
+    (SyncExtensions, Background),
+    (SyncExtensionsResponse, Background),
+    (InstallExtension, Background),
 );
 
 request_messages!(
@@ -491,6 +494,8 @@ request_messages!(
     (GetPathMetadata, GetPathMetadataResponse),
     (GetPanicFiles, GetPanicFilesResponse),
     (CancelLanguageServerWork, Ack),
+    (SyncExtensions, SyncExtensionsResponse),
+    (InstallExtension, Ack),
 );
 
 entity_messages!(