Add basic contributing docs (#664)

Adds initial docs with guidelines for contributing

CONTRIBUTING.md

@@ -0,0 +1,50 @@
+# Contributing
+> NOTE: This is the first iteration of this file. You're welcome to pull request changes
+
+### Contents
+- [Making issues](#Making-issues)
+- [Making pull requests](#Making-pull-requests)
+- [Formatting code](#Formatting-code)
+
+## Making issues
+When creating issues, whether to track a bug or suggest a feature, please try to follow this set of rules:
+1. When filing a bug report issue, please attach a log file ( Located in `R2Northstar/logs/` ).
+2. **Short, consise.** No-one wants to read an essay on why x should be added.
+3. When applicable attach a short video / screen shots to better convey what the issue is about.
+
+## Making pull requests
+When creating a pull request please follow this set of rules:
+1. **1 Fix/Feature should equal to 1 Pull Request.** The more you do in 1 PR the longer it'll take to merge.
+2. Mark your Pull Request as draft if it isnt finished just yet.
+3. Properly format your code. As we currently don't have a formatter we're very lax on this. That doesn't mean you don't have to try to format your code.
+4. **Mention how to test your changes / add a test mod to make it easier to test**
+
+## Formatting code
+A basic set of rules you should follow when creating a Pull Request
+
+### Comment your code
+- If you're adding a new file you should add a doc comment noting what the file does and its origin
+  ```cpp
+  ///-----------------------------------------------------------------------------
+  /// Origin: Northstar
+  /// Purpose: handles server-side rui
+  ///-----------------------------------------------------------------------------
+  ```
+  Alternative to `Origin: Northstar` would be `Origin: Respawn`
+- Each function should have a header doc comment
+  ```cpp
+  ///-----------------------------------------------------------------------------
+  /// Sends a string message to player
+  /// Returns true if it succeeded
+  ///-----------------------------------------------------------------------------
+  bool function NSSendInfoMessageToPlayer( entity player, string text )
+  ```
+### Functions
+- Functions should have spaces in the parentheses
+  ```cpp
+  bool function NSSendInfoMessageToPlayer( entity player, string text )
+  ```
+- If a function need to be threaded off using `thread` it should have a `_Threaded` suffix
+
+### File
+- Files should use tabs for indentation