v0.2.2

Ponytail audit — deleted 4 files, ~103 lines removed. Module-level global replaced with constructor kwarg.

Removed

• set_mode() / get_mode() — global module-level mode switch deleted. Replaced by Board(backend="pyfirmata2"|"pyserial") constructor kwarg. Default remains pyfirmata2.
• megawrapper/version.py — version now sourced from importlib.metadata.version("megawrapper").
• megawrapper/utils.py — delay() and millis() moved inline into __init__.py.
• examples/tank_drive.py — removed (9 → 8 examples).
• tests/test_exceptions.py — duplicated coverage.

Changed

• Board.__init__(port, stby, backend="pyfirmata2") — backend kwarg replaces set_mode().
• Board.__repr__ simplified with getattr instead of mode branching.
• motor.py — forward() / backward() call self.set_speed(speed).
• servo.py — _validate_and_clamp_angle removed; angle clamping inlined.
• sensor.py — I2C init deduplicated into _default_i2c() helper.
• __init__.py — delay() / millis() inline via stdlib time; version via importlib.metadata.
• All docs (README, CHANGELOG, wiki, AGENTS) updated for new API.

Notes

• 91 tests total (90 passing, 1 pre-existing env-related skip).
• Net: ~103 source lines removed, 4 files deleted.