Interpretation tests and pipeline updates

[ColtonPayne]

This PR:

• Adds unit tests for intperation.py and interpretation_fp.py for 99% branch coverage
• Adds tests (both functional and unit) to compare evaluations done with the numba JIT compiler against the pure python compilations
• Moved existing tests to a functional test directory
• Adds pre-commit hooks to run unit tests before each commit and functional/JIT comparison tests for each push
• Adds contributors guide for new users

[Copilot]

Pull Request Overview

This PR adds comprehensive unit tests for the interpretation modules and updates the testing pipeline to ensure consistent behavior between JIT and pure Python implementations.

• Adds unit tests for interpretation.py and interpretation_fp.py targeting 99% branch coverage
• Introduces functional and unit tests to verify consistency between numba JIT and pure Python execution
• Reorganizes test structure with dedicated functional test directory

Reviewed Changes

Copilot reviewed 22 out of 29 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/unit/dont_disable_jit/test_numba_consistency.py	Tests JIT/Python consistency for core interpretation functions
tests/unit/disable_jit/test_annotation_functions.py	Unit tests for annotation functions module
tests/unit/disable_jit/interpretations/	Comprehensive unit tests covering interpretation logic with high branch coverage
tests/functional/	Existing tests moved to functional directory with updated paths
contributing.md	New contributor guide with setup and testing instructions
.pre-commit-config.yaml	Pre-commit hooks for automated testing

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