Add timed input replay and declarative input-sequence DSL

[JE-Chen]

Remaining-backlog batch 14 (round-6 input-macro agent) — full five layers + headless tests + EN/Zh v24 docs + README.

Feature (utils/input_macro, pure-stdlib)

• Timed timeline replay — replay_timeline(events, speed=...): honor each event's delta_ms gap, scaled by speed, clamped to [min_gap,max_gap]; ops move/click/scroll/press/release/key. AC_replay_timeline + ac_replay_timeline.
• Input-sequence DSL — run_sequence(steps): declarative press/hold/release chords + {op:repeat}/{op:wait}. AC_input_sequence + ac_input_sequence.
• Both dispatch via an injectable sink and use an injectable sleep — unit-tested deterministically (fake clock + recording sink, no real input).

Verification

• 5 tests pass; ruff clean; radon no CC≥C; bandit clean; PySide6-free.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 33 complexity · 0 duplication

Metric	Results
Complexity	33
Duplication	0

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud