Ensured error handling is now consistent with the --binary

See merge request !36

- Added null checks to case_insensitive_compare in cmp_io.c

- Ensured error handling is now consistent with the --binary option when
  model file size does not match original data size see 3321f1d8 (Add
  model file size mismatch check and update version to 0.14, 2025-01-16)
- Enhanced cmp_tool integration tests to cover model size mismatch cases

Add pre-commit configuration file

See merge request !35

- Added a check to verify model file size matches original data size and report errors
- Fix buffer overflow in `read_file_data` when file size exceeds `buf_size`
- Updated version to 0.14

- cmp_io.c: Added missing header includes and adjusted brace usage for better readability.
- cmp_tool.c: Improved comment formatting and removed redundant else blocks.
- cmp_tool_integration_test.py: Removed unnecessary print statements.

This commit introduces a pre-commit configuration file
(.pre-commit-config.yaml) to ensure code quality and consistency by
automatically running various checks and fixes before commits are
finalized.

Quick start
===========
1. Install pre-commit
Before you can run hooks, you need to have the pre-commit package
manager installed.
Using pip:
pip install pre-commit

2. Install the git hook scripts
run:
pre-commit install
to set up the git hook scripts

Now pre-commit will run automatically on git commit!

3. (optional) Run against all the files
It's usually a good idea to run the hooks against all of the files when
adding new hooks (usually pre-commit will only run on the changed files
during git hooks):
pre-commit run --all-files

For more information see https://pre-commit.com

Update cmp_tool to version v0.13

See merge request !34

Replace typedef'd function pointer type with direct declaration in struct.

Make header validation more lenient by not failing decompression when
reserved field is non-zero. Print warning instead of error since this
may indicate corruption but shouldn't prevent decompression attempt.

Replace generic spill threshold estimation with mode-specific calculations:
- Add new cmp_best_zero_spill() function to optimize zero escape mechanism

Ensured consistency with Linux kernel style guidelines

- Add chunk-specific compression guessing functionality
- Support both RDCU and chunk data in guess operation
- Add compression parameter file I/O functionality

This change expands the compression parameter guessing system to handle
chunk data in addition to RDCU data. The new functionality helps users
find optimal compression parameters for different types of chunk data.

Move chunk type determination logic from cmp_icu.c into its own file

Consolidate l_fx_variance and l_cob_variance fields into a single
l_fx_cob_variance field in cmp_max_used_bits structure

- Improve code structure and readability in cmp_icu.c and decmp.c:
  - Mark constants as const where appropriate
  - Fix indentation alignment
  - Reorganize function order for better flow
  - Add space around operators
  - Split long lines for better readability
  - Fix comment formatting and alignment