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>

Cargo.lock

@@ -4170,6 +4170,7 @@ dependencies = [
  "paths",
  "project",
  "release_channel",
+ "remote",
  "reqwest_client",
  "schemars",
  "semantic_version",
@@ -4178,6 +4179,7 @@ dependencies = [
  "serde_json_lenient",
  "settings",
  "task",
+ "tempfile",
  "theme",
  "toml 0.8.19",
  "url",
@@ -9677,6 +9679,7 @@ dependencies = [
  "anyhow",
  "auto_update",
  "editor",
+ "extension_host",
  "file_finder",
  "futures 0.3.31",
  "fuzzy",
@@ -9852,6 +9855,7 @@ dependencies = [
  "client",
  "clock",
  "env_logger 0.11.5",
+ "extension_host",
  "fork",
  "fs",
  "futures 0.3.31",