feat: add the community-funded Homarr assistant provider (#6563)

* Add Homarr provider proxy foundation

* Complete Homarr provider integration

* Harden Homarr provider integration

* Address Homarr provider review feedback

* Address CodeRabbit provider feedback

* Localize provider errors

* Handle provider activity load failures

* docs: improve workshop and homepage

* Harden Homarr provider limits

* fix: harden the Homarr provider

* fix: address provider review feedback

* fix: clarify provider request accounting

* feat: complete the Homarr provider endpoint

* fix: terminate invalid provider streams

apps/docs/docs/workshop/index.mdx

@@ -0,0 +1,53 @@
+---
+title: Community Workshop
+sidebar_label: Overview
+tags:
+  - Workshop
+  - Custom Widgets
+  - Custom CSS
+---
+
+# Community Workshop
+
+The [Community Workshop](pathname:///workshop) is where Homarr users share Custom Widgets and dashboard CSS.
+
+:::warning Experimental
+
+Workshop content is made by the community. Review it before installation and back up your Homarr instance.
+
+:::
+
+## Find and install content
+
+Browse the Workshop by type, date, popularity, or recent activity. Each submission includes its source, screenshots,
+author, revision, comments, and reports.
+
+Administrators can install content without leaving Homarr:
+
+- **Custom Widgets:** open **Management → Custom Widgets**, then select **Import from Workshop**.
+- **Custom CSS:** open a board's **Settings → Custom CSS**, then select **Import from Workshop**.
+
+Homarr shows the complete source and required permissions before installation. Widget credentials are entered in your
+Homarr instance and are never included in a Workshop submission.
+
+## Share your work
+
+1. Sign in to the Workshop with GitHub.
+2. Select **Share yours**.
+3. Choose **Custom Widget** or **Custom CSS**.
+4. Add the source, a short description, screenshots, and a changelog.
+5. Review and publish the submission.
+
+Export Custom Widget JSON from **Management → Custom Widgets → Export**. You can edit a submission later without
+changing its Workshop URL.
+
+## Voting, comments, and reports
+
+Signed-in users can vote, comment, and report submissions. Authors can edit their own comments and submissions.
+Workshop moderators can review reports, remove comments, and delete unsafe content. Reports do not remove a submission
+automatically.
+
+A Workshop moderator manages the public community. This is separate from the administrator role on a Homarr instance.
+
+Deployment and server configuration are in the [Workshop operator guide](./operator). Local setup is in
+[Workshop development](./development).