Fix documentation and workflow examples for LEVEL setting functionality

[Copilot]

This PR addresses inconsistencies in documentation and workflow examples for the LEVEL setting functionality in GitArmor.

Analysis

Upon investigation, the core functionality requested in issue #15 is already implemented. The LEVEL environment variable allows users to choose whether GitArmor should run repository checks after organization checks:

• organization_only - Runs organization checks WITHOUT any repository checks
• organization_and_repository - Runs organization checks WITH repository checks for all repos
• repository_only - Runs repository checks only for a specified repo

Issues Found and Fixed

1. Workflow Examples Used Incorrect Values: The GitHub Actions workflow examples were using 'repository' and 'organization' instead of the correct values 'repository_only' and 'organization_only'

2. Incomplete Documentation: The action.yml file didn't specify the valid level values, and the README could be clearer about the behavior

3. Build Issues: Fixed case-sensitivity issues in TypeScript imports that prevented the project from building

Changes Made

• Updated .github/workflows/gitarmor-on-demand.yml to use correct level values and improve input description
• Updated .github/workflows/gitarmor-scheduled.yml to use 'organization_only' instead of 'organization'
• Enhanced action.yml to document all valid level values
• Improved README.md with clearer explanations of each level's behavior
• Fixed TypeScript import case sensitivity issues
• Corrected .gitignore formatting to properly exclude dist/ directory

Verification

Created verification tests confirming:

• ✅ organization_only does NOT run repository checks
• ✅ organization_and_repository DOES run repository checks for all repos in the org
• ✅ Users have full control over whether repository checks run via the LEVEL setting

The functionality requested in the issue was already present - this PR ensures the documentation and examples correctly reflect how to use it.

Fixes #15.

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