feature(ORM): update ORMThreadPoolBase's API

[pga2rn]

Introduction

This PR updates the ORMThreadPoolBase's API, now all the sql query APIs return concurrent.futures.Future object instead.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/simple_sqlite3_orm
__init__.py	7	0	100%
_orm.py	232	26	88%	43, 45–46, 49–50, 148, 402, 447, 529, 531–532, 541–542, 544, 582, 605, 648, 679, 681–682, 691–692, 694, 729, 758, 813
_sqlite_spec.py	36	0	100%
_table_spec.py	171	21	87%	45, 60, 69, 80, 84–85, 97, 109, 126, 187, 192–194, 270, 272, 274–275, 333–334, 443–444
_types.py	19	1	94%	27
_utils.py	51	5	90%	52, 65, 68, 78, 91
utils.py	97	17	82%	112, 119–120, 155–158, 204, 217, 237–241, 267, 271, 312
TOTAL	613	70	88%

Tests	Skipped	Failures	Errors	Time
60	0 💤	0 ❌	0 🔥	2m 3s ⏱️

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
95.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud