Rename firefox-tabs to f-around-firefox (faf) and add to PATH

scripts/f-around-firefox/README.md

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+# f-around-firefox (faf)
+
+Get information about Firefox's open tabs from the command line.
+
+## Usage
+
+```bash
+faf [method] [rdp_port]
+```
+
+**Methods:**
+- `session`, `s` - Read from Firefox session files (default)
+- `rdp`, `r` - Use Remote Debugging Protocol
+- `both`, `b` - Try both methods
+
+**Examples:**
+```bash
+faf                    # Use session files (default)
+faf rdp                # Use RDP on default port 6000
+faf rdp 9222           # Use RDP on port 9222
+```
+