Add developer guide

[gbeane]

Add Developer Documentation (CONTRIBUTING.md and DEVELOPMENT.md)

Summary

This PR adds comprehensive developer documentation split into two files:

• CONTRIBUTING.md - Quick-start contributor guide with copyright information
• DEVELOPMENT.md - Technical documentation covering architecture, setup, and implementation

Key Changes

New Files:

• CONTRIBUTING.md - Contribution guidelines, copyright assignment, quick setup
• DEVELOPMENT.md - Comprehensive technical guide (~1,100 lines)

Documentation Highlights:

• Copyright assignment to The Jackson Laboratory clearly stated
• Feature extraction system thoroughly documented (architecture, flow, FEATURE_VERSION management)
• jabs-cli unified CLI explained with future consolidation strategy
• Pre-commit hooks documented (what they do, how to fix failures)
• 5-minute quick start guide for new developers

Other Changes:

• Added --version flag to jabs command
• Moved matplotlib from test to dev dependency group (only used by dev/ scripts)
• Fixed type hint in base_group.py (dict[str, type[Feature]])
• Updated README.md to reference new documentation

Benefits

• GitHub automatically displays CONTRIBUTING.md to new contributors
• Clear copyright and license information upfront
• Extensive feature extraction documentation makes the most complex part of JABS accessible
• Guidance for future CLI consolidation

Testing

• ✅ All tests pass
• ✅ jabs --version works correctly
• ✅ Pre-commit hooks pass

[Copilot]

Pull request overview

This PR adds comprehensive developer documentation to JABS, split into CONTRIBUTING.md and DEVELOPMENT.md, along with the addition of a --version flag to the jabs command, improved type hints, and reorganization of the matplotlib dependency.

Key changes:

• New contributor and developer documentation files with copyright assignment to The Jackson Laboratory
• Comprehensive technical guide covering feature extraction architecture, FEATURE_VERSION management, and jabs-cli consolidation strategy
• Added --version flag to jabs command for version information access
• Fixed type hints across feature extraction modules (dict[str, type[Feature]])

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
CONTRIBUTING.md	New contributor guide with copyright assignment, quick-start setup, and submission guidelines
docs/DEVELOPMENT.md	New comprehensive technical documentation (~1,100 lines) covering architecture, feature extraction, CLI tools, and development workflow
README.md	Updated to reference new documentation files and streamline developer setup section
src/jabs/scripts/gui_entrypoint.py	Added --version flag and moved argument parsing before QApplication initialization
pyproject.toml	Moved matplotlib from test to dev dependency group
src/jabs/feature_extraction/*/group.py	Fixed type hint from dict[str, Feature] to dict[str, type[Feature]]
docs/user-guide.md	Moved from src/jabs/resources/docs/user_guide/user-guide.md with updated relative paths

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[bergsalex]

It might not be ready for this PR, but I tested using jabs with uvx and it worked really nicely!

https://docs.astral.sh/uv/guides/tools/#running-tools

[gbeane]

I've also used pipx