Create CONTRIBUTING.md

Author: zamronypj

CONTRIBUTING.md

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+# Contributing Guideline
+
+If you would like to contribute, please follows this coding style.
+
+- Free Pascal keywords must be written in lowercase.
+- Identifier should be written in camelCase with meaningful name.
+- Statements between begin end must indented 4 spaces.
+- Soft limit of 80 characters per line.
+- Prefer readability over brevity.
+- Just enough comment where makes sense. Code should speaks for itself.