feat: orm: allow pre-define and pin table_name when defining ORM

[pga2rn]

This PR introduces to expose the _orm_table_name attr as an API for the ORM.
User can use this attr to pre-define and pin table_name in advance.
The previous init param table_name is still in-use, and will override the pre-defined _orm_table_name if specified.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/simple_sqlite3_orm
__init__.py	7	0	100%
_sqlite_spec.py	36	0	100%
_table_spec.py	187	35	81%	49, 58, 69, 73–74, 86, 98, 115, 174, 179–181, 221, 302, 304, 306–307, 355, 358, 362–364, 366–370, 372, 378, 421–422, 532–533, 547–548
_types.py	22	1	95%	31
_utils.py	68	10	85%	40, 42–43, 46–47, 69, 82, 85, 95, 108
utils.py	120	36	70%	127, 134–135, 170–173, 219, 232, 252–256, 282, 286, 327, 332–339, 351–353, 355–356, 359, 361–363, 372–373
src/simple_sqlite3_orm/_orm
__init__.py	4	0	100%
_async.py	98	11	88%	34, 74, 76–77, 90–91, 93, 127, 129, 151, 155
_base.py	122	8	93%	103, 115, 170, 272, 312, 394, 434, 457
_multi_thread.py	111	11	90%	32, 34–35, 70, 72–73, 86–87, 89, 122, 141
TOTAL	775	112	85%

Tests	Skipped	Failures	Errors	Time
72	0 💤	0 ❌	0 🔥	2m 4s ⏱️

[sonarqubecloud]

Quality Gate failed

Failed conditions
77.8% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud