Create contributing guidlines

CONTRIBUTING.md

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+This file is unfinished!
+# Contributing Guidelines
+## Repository structure
+## Code structure
+- Every codefile must have the following comment ad the first few lines:
+```lua
+--[[ 
+	<Title/file function>
+	Author: <Original author>
+	Version: <Corresponding ccpt version or file version if not directly related to ccpt version (eg. installer>
+]]
+```
+## Process applies for default package list