docs: Add README for @angular/language-server (#414)

* docs: Add README for @angular/language-server

* Update server/README.md

Co-Authored-By: hafiz <[email protected]>

Author: kyliau

scripts/build.sh

@@ -15,7 +15,7 @@ cp package.json yarn.lock angular.png README.md dist
 # Copy files to client directory
 cp client/package.json client/yarn.lock dist/client
 # Copy files to server directory
-cp server/package.json server/yarn.lock dist/server
+cp server/package.json server/yarn.lock server/README.md dist/server
 
 pushd dist
 yarn install --production --ignore-scripts

server/README.md

@@ -0,0 +1,6 @@
+# @angular/language-server
+
+This package contains the Language Server Protocol ([LSP](https://microsoft.github.io/language-server-protocol/)) implementation of the Angular Language Service.
+
+## Usage
+See `node index.js --help`