Create CONTRIBUTING.md

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Author: prathameshnium

CONTRIBUTING.md

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+# Contributing to PICA
+
+Thank you for your interest in PICA (Python-based Instrument Control and Automation)
+
+As this is primarily a research project for the UGC-DAE CSR Mumbai Centre, our main goal is stability for our experiments. However, we welcome feedback and contributions from the scientific community.
+
+## How to Report Bugs
+If you encounter an error while running a measurement:
+1.  Go to the [Issues tab](https://github.com/prathameshnium/PICA-Python-Instrument-Control-and-Automation/issues).
+2.  Click "New Issue".
+3.  Include the error message from the PICA console and which instrument you were using (e.g., Keithley 2400).
+
+## How to Suggest Features
+If you have a script for a new instrument (e.g., a lock-in amplifier) that you would like to include:
+1.  Fork this repository.
+2.  Add your script to a new folder (e.g., `SRS_830/`).
+3.  Submit a Pull Request (PR) describing what the instrument does.
+
+## Development Setup
+To run the PICA launcher locally for development:
+```bash
+pip install -e .
+python PICA_v6.py