LSP working for Swift

backend/src/langs.ts

@@ -1028,6 +1028,7 @@ END
     main: "main.swift",
     compile: "swiftc main.swift",
     run: "./main",
+    lsp: "sourcekit-lsp",
     template: `print("Hello, world!")
 `,
   },

scripts/docker-install-phase5.bash

@@ -119,6 +119,7 @@ gdown "https://drive.google.com/uc?export=download&id=1eE1-VuZz0gv-fITaGVT_r1Uun
 mkdir /opt/swift
 tar -xf swift.tar.gz -C /opt/swift --strip-components=2
 ln -s /opt/swift/bin/swiftc /usr/bin/swiftc
+ln -s /opt/swift/bin/sourcekit-lsp /usr/bin/sourcekit-lsp
 rm swift.tar.gz
 
 popd >/dev/null