feat: Add Python 3.15 support and fix quantum healing activation

Major Changes:
- Add full Python 3.15.0a5 support with proper release tag mapping
- Extend requires-python constraint to <3.16 in pyproject.toml
- Fix quantum healing not triggering during install package validation

Quantum Healing Fixes:
- Add _OMNIPKG_QUANTUM_HEALING environment flag to distinguish automated swaps
- Ensure NoCompatiblePythonError properly bubbles up through pip resolution
- Prevent quantum healing from being swallowed by generic exception handlers
- Clean up quantum healing flag in finally block to prevent state leakage

Python 3.15 Support:
- Add version-to-release-tag mapping for 3.15.0a5 (20260203)
- Add full version resolution for 3.15 -> 3.15.0a5
- Skip safety package on Python 3.15+ (pydantic-core incompatibility)
- Update core dependency filtering logic for version constraints

Implementation Detection:
- Add _detect_python_implementation() to identify CPython vs PyPy vs GraalPy
- Enforce CPython-only adoption with fallback to managed install
- Use implementation name in interpreter directory paths (future-proofs for PyPy)
- Add SUPPORTED_IMPLEMENTATIONS class constant

Python Context Switching:
- Simplify switch_active_python() for quantum healing use case
- Remove Windows-specific fast path (now handled by dedicated swap command)
- Focus on in-memory config updates only during automated healing
- Add user guidance to use '8pkg swap python' for interactive shells

Safety Version Constraints:
- Python 3.7-3.9: use safety 2.x
- Python 3.10-3.14: use safety 3.x (default)
- Python 3.15+: skip safety (not yet compatible)

Bug Fixes:
- Fix exec restart to use '-m omnipkg.cli' instead of raw sys.argv
- Parse version once in core dependency filtering for efficiency
- Add proper translation formatting for skip/diagnostic messages
- Update Arabic translations (automated via 8lang)

Author: 1minds3t

pyproject.toml

@@ -11,7 +11,7 @@ authors = [
 ]
 description = "The Ultimate Python Dependency Resolver. One environment. Infinite packages. Zero conflicts."
 readme = "README.md"
-requires-python = ">=3.7, <3.15"
+requires-python = ">=3.7, <3.16"
 
 # Use old-style license for Python 3.7 compatibility
 license = { text = "AGPL-3.0-only OR LicenseRef-Proprietary" }