Fix CI for expanded output format support

[houjun]

This replaces #9, which could not be updated directly because the original source branch is not accessible.

Changes included:

• fix ESSI output creation for HDF5 and CSV inputs
• preserve CSV coordinate precision to avoid boundary-domain failures
• write CSV->ESSI output to an HDF5 filename instead of the CSV source name
• update tests and README to match the expanded output-format behavior

Validation:

• python -m unittest discover -s tests -p "test_*.py"
• single-process conversion check matching the CI fixture validation

Supersedes #9.

[Copilot]

Pull request overview

This PR expands output-format support so that HDF5 (.h5) and CSV inputs can generate ESSI and OpenSees-style outputs (in addition to the existing “point” output), and updates tests/docs to match.

Changes:

• Allow explicit --output-format overrides for all input kinds (DRM/HDF5/CSV/template).
• Fix ESSI output filename selection for CSV inputs (write to .h5 output rather than the source .csv name).
• Update unit tests and README to validate/document the expanded behavior.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
convert.py	Broadens supported output modes, adjusts ESSI output naming for CSV, and updates ESSI HDF5 creation logic.
tests/test_convert_helpers.py	Updates expectations for output-mode resolution and output filename behavior.
tests/test_convert_fixture_data.py	Adds fixture-driven tests for HDF5→ESSI/OpenSees and CSV→ESSI conversions.
template/motion_setting.csv	Normalizes CSV fixture formatting (line ending / newline consistency).
README.md	Documents that all output formats are supported across input kinds and clarifies metadata behavior.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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