Create a separate GitHub Action repository for Chelonian workspace analysis and report publishing

[MrBearing]

Summary

Add a GitHub Actions workflow that runs Chelonian against a ROS workspace and publishes the generated analysis report as a static page.

Motivation

Chelonian already has strong value as a local CLI, but one of its most practical use cases is continuous visibility of a workspace's structure and findings.

If analysis and report publication can be automated in GitHub Actions, users would be able to:

• continuously inspect workspace/package dependencies
• share static report pages with a team
• review findings without requiring a local Chelonian setup
• use Chelonian as part of documentation / review / CI workflows

Scope

At this stage, this issue is intentionally broad and can start as a single tracking issue.
Implementation may require work in this repository and possibly in a separate repository depending on how reusable the workflow is intended to be.

Possible directions

• add a workflow template in this repository
• add a reusable workflow for other repositories
• support publishing to GitHub Pages
• support configurable target workspace paths and report output locations
• optionally support scheduled runs and/or runs on push

Notes

This is related to the existing sample-report publishing idea, but the goal here is broader: enabling workspace analysis/report publishing as a reusable workflow pattern, not only maintaining a single sample page.