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/remote_server/Cargo.toml

@@ -29,6 +29,7 @@ chrono.workspace = true
 clap.workspace = true
 client.workspace = true
 env_logger.workspace = true
+extension_host.workspace = true
 fs.workspace = true
 futures.workspace = true
 git.workspace = true