added project structure for spring boot java language server

vscode-extensions/vscode-boot-java/README.md

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+# VS Code Language Server for Spring Boot Application Properties
+
+VSCode extension and Language Server providing support for working with Spring Boot apps in Java.
+
+## Installation:
+
+Currently this plugin is not distributed via vscode marketplace. You can only install
+it from a .vsix file. You can download it here:
+
+   TODO: add link
+
+To install it:
+
+- open vscode. 
+- press `CTRL-SHIFT-P` and search for VSIX
+- select `Extension: Install from VSIX`
+
+## Usage:
+
+The extension will automatically activate when you edit files with the following
+name patterns:
+
+ - `*.java` => activates support for Java files
+
+# Developer notes
+
+## Bulding and Running
+
+This project consists of three pieces:
+
+ - a vscode-extension which is a language-server client implemented in TypeScript.
+ - commons-vscode: a local npm module with some utilities implemented in TypeScript.
+ - a language server implemented in Java.
+
+To build all these pieces you normally only need to run:
+
+   npm install
+
+**However, the first time you build** it might fail trying to
+find the `commons-vscode` module on npm central. Once we publish a stable 
+version of that module on npm central that will no longer be a problem. 
+Until that time, you can work around this by doing a one time manual 
+run of the `preinstall` script prior to running `npm install`:
+
+    ./scripts/preinstall.sh
+    npm install
+
+Now you can open the client-app in vscode. From the root of this project.
+
+    code .
+
+To launch the language server in a vscode runtime, press F5.
+
+## Debugging
+
+To debug the language server, open `lib/Main.ts` and edit to set the
+`DEBUG` option to `true`. When you laucnh the app next by pressing
+`F5` it will launch with debug options being passed to the JVM.
+
+You can then connect a 'Remote Java' Eclipse debugger on port 8000.
+
+## Packaging as a vscode extension
+
+First make sure the stuff is all built locally:
+
+     ./scripts/preinstall.sh  # only needed if this is the first build.
+     npm install
+
+Then package it:
+
+     npm run vsce-package
+
+This produces a `.vsix` file which you can install directly into vscode.