Document unsupported status and third party resources for setup of CollectOSS on Windows (including WSL)

> [!NOTE]
> Migrated from [augurlabs/augur#3108](https://github.com/augurlabs/augur/issues/3108)
> Originally opened by `@Akshatb2006` on 2025-04-05

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### Issue

There are no specific setup instructions for running Augur on Windows using WSL (Windows Subsystem for Linux). I attempted to set up Augur using WSL with Ubuntu and faced several issues due to missing or unclear steps in the documentation.

### What I Tried

- Used WSL2 with Ubuntu 22.04
- Followed the general setup guide from the README
- Faced issues during `augur backend start`, including dependency problems, unclear DB setup steps, and configuration issues.
- Had to manually troubleshoot a lot, which could’ve been avoided with a dedicated WSL section.

### Suggested Improvements

- Add a section in the documentation (README or a new file like `SETUP_WSL.md`) for WSL-based setup.
- Mention prerequisites like Docker Desktop with WSL integration, PostgreSQL handling inside/outside WSL, and `.env` config.
- Share common errors and solutions (e.g., how to handle port conflicts or PostgreSQL access).

### Environment

- OS: Windows 11
- WSL: Ubuntu 22.04 (WSL2)
- Docker Desktop (with WSL backend)
- Command that caused issues: `augur backend start`, DB connection setup

Happy to help contribute to this if needed!