Rename clifford to gate and remove gate stdlib

[david-pl]

Closes #523

[codecov]

Codecov Report

❌ Patch coverage is 70.66667% with 22 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/bloqade/squin/stdlib/broadcast/gate.py	4.76%	20 Missing ⚠️
src/bloqade/cirq_utils/lowering.py	90.00%	2 Missing ⚠️

📢 Thoughts on this report? Let us know!

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
10881	9129	84%	0%	🟢

New Files

File	Coverage	Status
src/bloqade/pyqrack/squin/gate/_init_.py	100%	🟢
src/bloqade/squin/gate/_dialect.py	100%	🟢
TOTAL	100%	🟢

Modified Files

File	Coverage	Status
src/bloqade/cirq_utils/emit/init.py	100%	🟢
src/bloqade/cirq_utils/lowering.py	93%	🟢
src/bloqade/native/upstream/squin2native.py	100%	🟢
src/bloqade/pyqrack/_init_.py	100%	🟢
src/bloqade/squin/_init_.py	100%	🟢
src/bloqade/squin/groups.py	97%	🟢
src/bloqade/squin/stdlib/broadcast/_init_.py	100%	🟢
src/bloqade/squin/stdlib/simple/_init_.py	100%	🟢
TOTAL	99%	🟢

updated for commit: df9d57f by action🐍

[weinbe58]

LGTM