feat: parsEO dashboard with clickable chip-tree filename builder

[MatMatt]

Summary

Adds the parsEO dashboard to CLMS_documents — a filename builder tool with:

Features

• Schema browser — browse all parsEO families and versions
• Clickable chip-tree — build filenames by clicking pill-shaped chips for each field (enum values), with fallback text inputs for free-form fields
• Live filename preview — assembles via the parsEO API on selection change
• Parse tab — paste a filename → get parsed fields
• Schema viewer — view raw schema JSON
• Validate tab — paste a schema JSON → validate against parsEO

Architecture

• Static HTML served via SWAG at
• API via FastAPI module (PR feat: add web API server (FastAPI) with serve CLI command copernicus-land/parsEO#258)
• Auto-connects to same-origin API, no configuration needed

Files

• — the dashboard
• — setup + API docs

[chatgpt-codex-connector]

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