Replace the old `bread modules install` docs with `bakery install breadmon`.
Spell out that `hyprctl eval 'hl.monitor({...})'` is BOS-patched Hyprland
only, and that breadmon is not the bos-settings Display panel (which edits
monitors.json).
- apply_monitors() shells out to `hyprctl eval` with a `hl.monitor()`
Lua call, a BOS-only Hyprland extension. On vanilla Hyprland the
eval request itself isn't recognized and failed with a confusing
raw hyprctl response. Detect that case and fail with an explicit
'this feature requires BOS' message instead, with tests.
- README: documented the BOS dependency for the apply step under
Requirements; noted everything else in the TUI works without it.
- Cargo.toml: 0.1.0 -> 0.1.1, matching the latest tag (v0.1.1).
