Document the AI module ecosystem: a categorized list of related modules with links and summaries
## Description
The AI module has grown a large ecosystem of companion projects on drupal.org — providers, vector database (VDB) providers, agents, recipes, tools, automators, and full distributions/CMS profiles. Today there is no single, curated page in the AI module's documentation that tells a site builder or developer **what exists, where to find it, and what each project does.**
Discovering these modules currently means searching drupal.org by hand or relying on word of mouth. A maintained ecosystem index would make the AI module dramatically easier to adopt: people could see at a glance which provider integrations, search backends, and ready-made recipes are available before they start building.
We already track adding individual modules to a "related modules" list (see #3583958). This task proposes the broader, structured documentation page that such additions would live in.
A source list of **~196 projects** currently associated with the AI module ecosystem is included at the bottom of this issue as a starting point.
## Tasks
* [x] Decide where the ecosystem index should live: AI Dashboard Gitlab Pages
* [x] For each project, capture: machine name, human-readable title, a canonical link (`https://www.drupal.org/project/<machine_name>`), and a one-to-two sentence summary of what it does.
* [x] Flag projects that are abandoned, merged into core AI, or duplicates so the list stays trustworthy.
* [x] Publish the page and link it from the AI module's main documentation landing page and README.
* [x] Add a short "how to get listed" note so new ecosystem modules can be added over time. --- Just depend on the module, and it'll work.
## Testing instructions
1. Visit https://ai-dashboard-41c651.pages.drupalcode.org/ecosystem/
2. See the list of modules and recipes
3. Enter "Provider" as the search
4. Expect to see the list of modules filter to just "Provider" modules
5. Flip over to the Recipes page
6. Expect to see a list of recipes
issue