Add detailed beginner setup guide for macOS Gatekeeper restrictions

[Copilot]

macOS Gatekeeper blocks the start.command one-click launcher, creating a barrier for non-technical users.

Changes

• New file: detailed-setup.md - 479-line beginner-oriented setup guide covering:
  • Miniconda installation with architecture-specific download links
  • Project download via GitHub ZIP or Git
  • Manual Python environment setup and dependency installation
  • macOS Gatekeeper bypass instructions - Two methods to unblock start.command:
    1. Right-click → Open → confirm dialog
    2. System Settings → Privacy & Security → "Open Anyway"
  • Fallback manual launch if script remains blocked
  • Comprehensive troubleshooting (conda PATH issues, port conflicts, permission errors, memory issues)
  • Cross-platform alternatives (Windows, Linux)

Key sections

### If start.command Works (Try This First)
3. **If macOS blocks it with a security warning:**
   - Right-click (or Control-click) on `start.command`
   - Select **"Open"** from the menu
   OR
   - Go to **System Settings → Privacy & Security**
   - Click **"Open Anyway"**

### If start.command Doesn't Work (Manual Method)
conda activate sharp
python src/sharp/web/app.py

Explains concepts (what is Conda, environments) for users with no Python experience. Includes hardware requirements, installation timings, and common error resolutions.

Original prompt

In our project we have a start.command script that is a one click script to get people started. However, macOS may block it due to gatekeeper. I'd like a new "detailed-setup.md" that guides extreme beginners on how to set up the project, what they may need to download, etc. extreme hand holding. Create a new md file based on the start.command that guides a beginner so they can use this project.

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