Initialize AI Penpot module

Problem/Motivation

Designers work in Penpot, but there is no way for the Drupal Canvas AI assistant to read a Penpot design. AI Penpot is the Penpot counterpart of AI Figma: it reads live Penpot design context (colours, typography, verbatim text and a shape outline) via the Penpot RPC API from server-side PHP and exposes it as AI Agent tools, so an author can paste a Penpot link and have the Drupal Canvas AI assistant build from the real design. Config-driven, theme- and framework-agnostic.

Steps to reproduce

Fresh project — no module code exists yet (the 1.0.x branch contains only a README).

Proposed resolution

Add the base module:

• PenpotContextClient — Penpot RPC client (Authorization: Token access token from the Key module, SSRF-guarded base URL, Penpot URL parsing, get-file / get-page, design-token summary).
• Settings form at /admin/config/ai/penpot (instance URL, token Key, default file id, Test connection) + install hook provisioning an encrypted penpot Key.
• Two AI Agent tools: ai_penpot:list_design_pages and ai_penpot:design_context.
• Editable AI guidance seeded as AI Context items.

Remaining tasks

• ✅ Base connection module (client + settings + Key)
• ✅ AI Agent read tools (list pages, read design context)
• ✅ Verified end-to-end with Drupal Canvas AI (paste a Penpot link → reads the design)
• ❌ Reviewed by a human

User interface changes

New admin settings form at /admin/config/ai/penpot (Configuration → AI → AI Penpot).

API changes

None (new module).

Data model changes

None. Adds a penpot Key entity and the module configuration.

Release notes snippet

Initial release of AI Penpot: read Penpot design context into the Drupal Canvas AI assistant via AI Agent tools.