fix: lower required Python floor from 3.13 to 3.11

[MSeyyidDev]

Summary

Relaxes requires-python in pyproject.toml from >=3.13 to >=3.11 so the CI matrix (Python 3.11 / 3.12) can install the package, and adds 3.11 / 3.12 trove classifiers.

Root cause

CI matrix ran on Python 3.11 + 3.12. pip install -e . failed with:

ERROR: Package 'log-analyzer-cli' requires a different Python: 3.11.15 not in '>=3.13'

The original floor reflected the local dev environment (Python 3.13) but the package itself uses no 3.13-only language features or stdlib calls, so the floor was unnecessarily strict.

Technical details

• requires-python = >=3.11
• Added Programming Language :: Python :: 3.11 and 3.12 classifiers next to the existing 3.13 one.
• No code changes; the codebase is plain Python compatible with 3.11+.

Testing notes

• Will be verified by the CI job that this PR triggers.
• Locally still installs and tests cleanly on 3.13.