Docs: Document the Dapr Agents Drasi extension (drasi_trigger)

[sicoyle]

What content needs to be created or modified?

We need a new integration added under Dapr Agents for the new Drasi extension.

Describe the solution you'd like

1. Restructure the Integrations page into an index.

It's currently one long page. Convert it so each integration is just a title + 1–2 sentence description linking to its own child page. Move the existing content into child pages and add Drasi as a new one:

• Text Splitter
• Arxiv Fetcher
• Vector Stores
• Agents as Tools
• MCP Toolbox for databases
• Drasi (new)

2. Create the Drasi child page. Follow the existing integration convention (Text Splitter, Vector Stores, etc.): teach the API inline with code snippets, not a link-out to a quickstart. Cover:

• What Drasi is and when to use it
• Install: pip install dapr-agents[drasi]
• drasi_trigger usage and configuration (with defaults), shown inline
• Event filtering by operation and view validation
• The DrasiChangeEvent and DrasiOperation models
• A link to the runnable examples/ext-drasi-*-k8s sample for the full deployable version (don't reproduce it in full)

3. Update the Quickstarts page. This page is a table of links to repo samples, not inline tutorials. Add a new row to the Examples table pointing to examples/ext-drasi-*-k8s with a one-line description.

The associated pull request from dapr/dapr, dapr/components-contrib, or other Dapr code repos

This tracks the docs work for dapr/dapr-agents#665, which adds a Drasi extension for DurableAgent. This is an integration that ships dapr_agents.ext.drasi, a one-line drasi_trigger(agent, ...) that lets a DurableAgent consume Drasi change events:

• Filters events by Drasi operation (insert / update / delete) and validates them against user-defined models/"views".
• Matching events trigger agent workflow runs with a customizable task payload.
• Public API: drasi_trigger, DrasiChangeEvent, DrasiOperation.
• Installs via pip install dapr-agents[drasi].
• Working examples live in the repo under examples/ext-drasi-*-k8s.

Additional context

Done when:

• Integrations page is an index of title + short description links to child pages
• Drasi child page created with inline usage (install, drasi_trigger, filtering/validation, models) and a link to the repo example
• New row added to the Quickstarts "Examples" table for examples/ext-drasi-*-k8s
• Docs PR opened and linked back on feat(ext-drasi): add Drasi extension for DurableAgent dapr-agents#665

[JeffreyJPZ]

/assign