Readme updates

[ppinchuk]

Reformat main README

[Copilot]

Pull request overview

This PR reformats the main README from Markdown to reStructuredText format and consolidates project configuration by migrating pytest settings from pytest.ini into pyproject.toml.

Key Changes:

• Converted README.md to README.rst with improved formatting and badge display
• Migrated pytest and coverage configuration from pytest.ini to pyproject.toml
• Updated GitHub issue templates to use checkboxes instead of input fields for charge code sections

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
README.md	Removed old Markdown README
README.rst	Added new reStructuredText README with badges and improved documentation structure
pytest.ini	Removed pytest configuration file
pyproject.toml	Added pytest and coverage tool configurations to consolidate project settings
.github/workflows/ci-python.yml	Updated workflow names to remove "Unit" from test job names
.github/ISSUE_TEMPLATE/feature_request.yaml	Changed charge-code field from input to checkboxes type
.github/ISSUE_TEMPLATE/bug_report.yaml	Changed charge-code field from input to checkboxes type
pixi.lock	Updated version hash and SHA for local package

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