Update README and pyproject.toml; enhance annotations handling and tests

[kyoung73]

• Updated README.md to improve badge visibility and added GitHub actions and issues badges.
• Bumped version in pyproject.toml to 1.2.4 and updated deprecated fields.
• Enhanced Annotations class to check for 'SeqId' in both index and columns.
• Added new test cases for handling SeqId in annotations lifting.
• CAN-26

[Copilot]

Pull Request Overview

Enhance project metadata, documentation, and annotations handling to support SeqId in both index and columns, and expand tests accordingly.

• Improve README badges and remove deprecated anchors.
• Migrate pyproject.toml to PEP 621-style metadata, bump version to 1.2.4, and update dependencies.
• Extend Annotations.update_adat_column_meta and Annotations.lift_adat to detect SeqId in either index or columns, with new tests covering the scenarios.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
tests/test_annotation_lifting.py	Refactored test helpers, added constants, and new test cases for SeqId in index/columns
somadata/annotations.py	Added SeqId presence checks in both index and columns for updating metadata and lifting
pyproject.toml	Converted to [project] table format, bumped version, added requires-python and dependencies
README.md	Updated badges and cleaned up redundant “return to top” anchors

Comments suppressed due to low confidence (2)

tests/test_annotation_lifting.py:23

• [nitpick] The parameter index_col accepts both False and a column name string, which can be confusing. Consider renaming it to index_label or index_name to clarify its purpose.

def create_annotations_from_csv(csv_data: str, index_col=False) -> Annotations:

README.md:109

• [nitpick] There are several 'return to top' links scattered throughout this document. Consider consolidating or removing redundant anchors to improve readability.

[return to top](#toptoc)