Restructure crates/macos/src/ from flat files into tree/, actions/,
input/, system/ subfolders. No file exceeds 400 LOC.
Add actions/activate.rs with a 10-step discovery-based activation chain:
steps 1-9 are pure AX (AXPress, AXConfirm, AXOpen, AXPick, AXSelected,
AXSelectedRows on parent, focus+retry, child walk, parent walk),
step 10 falls back to CGEvent only when every AX path fails.
Wire smart_activate() into Click/DoubleClick/RightClick/TripleClick/Toggle.
Add AXDisclosing attribute fallback for Expand/Collapse.
Rewrite README with full command reference.
Documents the root cause (sequential AX IPC calls per node), the fix
(AXUIElementCopyMultipleAttributeValues batch fetching), measured wall-time
benchmarks across TextEdit/Finder/System Settings/Xcode, and the secondary
optimisations: FxHashSet cycle detection, streaming JSON serialisation, and
per-element messaging timeout.
