Remove separate games user. Add hidraw udev rule for
gamepad support in Wine/Proton.

- mod+w: flatten all workspace windows into tabbed layout
- mod+Tab: cycle focus through leaf windows in tree order
- Remove split bindings (mod+b/v) to avoid accidental sub-containers
- Remove autotiling (replaced by explicit layout control)

Teaches the agent how to:
- Use ghidra-analyzeHeadless for static analysis and decompilation
- Write custom Ghidra scripts for targeted analysis
- Use GDB in batch mode to debug running processes
- Combine both for full reverse engineering workflows

Create window with first tab URL directly instead of creating
a blank window and trying to clean up the new tab afterwards.