Benchmark and optimize apply performance

[brownie-ricon]

Summary

apply has noticeable time sinks that could be measured and optimized:

• Sleep timers between space navigation and window operations (0.3s, 0.5s, 1s)
• Sequential Hammerspoon CLI calls (each has IPC overhead)
• Swift compilation on first run
• Wallpaper generation time per space

Would be useful to:

• Add timing instrumentation (total time, per-space breakdown, per-operation)
• Identify which sleeps can be reduced without breaking reliability
• Explore batching multiple HS operations into single CLI calls
• Consider parallel wallpaper generation

This becomes more important as the manifest grows (more apps per zone, more zones).