I-ALiRT - add since parameter

[laspsandoval]

This pull request adds support for a new --since parameter to the ialirt-archive-query CLI and underlying API, allowing users to query archive files from a specified date onward. It also enforces that --since cannot be combined with the existing date filters (--year, --month, --day). Documentation and tests have been updated to reflect and validate this new functionality.

New Feature: Archive Query by Date Range

• Added a --since argument to the CLI (ialirt_data_access/cli.py) and the archive_query function (ialirt_data_access/io.py), enabling users to retrieve all files on or after a given date in YYYYMMDD format. [1] [2] [3]

Input Validation

• Enforced that since cannot be combined with year, month, or day in the API, raising a ValueError if this rule is violated.

Documentation Updates

• Updated CLI usage examples and documentation in README.md and ialirt_data_access/cli.py to describe the new --since parameter and its constraints. [1] [2]

Testing

• Added new tests to verify correct behavior when using since, and to ensure errors are raised when since is combined with other date filters.

Internal Refactoring

• Updated query parameter construction to include since only when provided, ensuring clean API requests.

These changes collectively enhance the flexibility of archive queries and improve user guidance and code robustness.