HackStudio: Add a Shell language server

Author: https://github.com/alimpfard
Commit: 6b55b007dd
Pull-request: https://github.com/SerenityOS/serenity/pull/3675
Reviewed-by: https://github.com/awesomekling

DevTools/HackStudio/LanguageServers/Shell/CMakeLists.txt

@@ -0,0 +1,15 @@
+set(SOURCES
+    ClientConnection.cpp
+    main.cpp
+    AutoComplete.cpp
+)
+
+set(GENERATED_SOURCES
+    ../LanguageServerEndpoint.h
+    ../LanguageClientEndpoint.h)
+
+serenity_bin(ShellLanguageServer)
+
+# We link with LibGUI because we use GUI::TextDocument to update
+# the content of files according to the edit actions we receive over IPC.
+target_link_libraries(ShellLanguageServer LibIPC LibShell LibGUI)