#143: Re implement upload submission files

[leoraba]

Summary

Re implement support of upload submission files. Supported extensions are .tsv and .csv

Issues

• Re-implement POST /data endpoint to accept file arrays #143

Description of Changes

Enhanced endpoints to support file uploads for submissions.

Server

• Modified the New Submission endpoint (POST /submission/category/:categoryId/data) to accept file uploads.
• Modified the Edit Submission endpoint (PUT /submission/category/:categoryId/data) to accept file uploads.

Swagger

• Updated Swagger documentation for both endpoints to include the required files parameter in the request.

Documentation

• Updated README file to include a description with examples of new environment variable FILES_LIMIT_SIZE

Readiness Checklist

• Self Review
  • I have performed a self review of code
  • I have run the application locally and manually tested the feature
  • I have checked all updates to correct typos and misspellings
• Formatting
  • Code follows the project style guide
  • Autmated code formatters (ie. Prettier) have been run
• Local Testing
  • Successfully built all packages locally
  • Successfully ran all test suites, all unit and integration tests pass
• Updated Tests
  • Unit and integration tests have been added that describe the bug that was fixed or the features that were added
• Documentation
  • All new environment variables added to .env.schema file and documented in the README
  • All changes to server HTTP endpoints have open-api documentation
  • All new functions exported from their module have TSDoc comment documentation

[leoraba]

This PR depends on PR #146