feat: Remove legacy code, rewrote server.ts

This commit replaces the implementation for the language server to use
the new ProjectService.
Old tests that are no longer relevent are removed.

This completes the migration to the new prototype.

Author: Keen Yee Liau

integration/lsp/smoke_spec.ts

@@ -5,5 +5,8 @@
     "@angular/core": "~8.2.2",
     "rxjs": "^6.4.0",
     "zone.js": "^0.10.2"
+  },
+  "devDependencies": {
+    "@angular/language-service": "^9.0.0-next.3"
   }
 }

integration/project/package.json

@@ -9,6 +9,11 @@
   dependencies:
     tslib "^1.9.0"
 
+"@angular/language-service@^9.0.0-next.3":
+  version "9.0.0-next.3"
+  resolved "https://registry.yarnpkg.com/@angular/language-service/-/language-service-9.0.0-next.3.tgz#f8f3c7fe4125c187757efd30b31351a5f5d49156"
+  integrity sha512-luQd/bVoUAqO+o/UYhUJWm4Otm9OTUoC13ScVm2b5RQNoLPKBsT+gO/tnbMRGbNlkjlll2FL5iFkqMbyB1PRFA==
+
 rxjs@^6.4.0:
   version "6.5.2"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.5.2.tgz#2e35ce815cd46d84d02a209fb4e5921e051dbec7"