Source dataverse plugin externally from microsoft/Dataverse-skills (#1010)

* Source dataverse plugin from microsoft/Dataverse-skills

The Dataverse plugin was previously bundled locally with a single
mcp-configure skill. It is now sourced externally from
microsoft/Dataverse-skills, which provides the full skill set:
init, setup, metadata, python-sdk, solution, mcp-configure, and overview.

- marketplace.json: update dataverse entry to external source format
- external.json: add Dataverse entry alongside Azure
- plugins/dataverse/: remove local plugin directory (now external)
- skills/mcp-configure/: remove top-level copy (now in external plugin)
- docs/README.plugins.md: update dataverse row with external link
- docs/README.skills.md: note mcp-configure moved to external plugin

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Make dataverse plugin docs generic to avoid stale counts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Remove mcp-configure from skills index — now in external plugin

External plugins don't list their skills in README.skills.md
(consistent with azure-skills).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Revert manual edits to generated files

marketplace.json, README.plugins.md, and README.skills.md are
auto-generated. External plugins are discovered via external.json
and merged into marketplace.json by generate-marketplace.mjs.
Matches the Azure external plugin pattern — no manual doc entries.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Regenerate marketplace.json and docs after external plugin change

Run npm run build to pick up the new external dataverse entry and
remove the old local one from generated files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

docs/README.skills.md

@@ -150,7 +150,6 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [make-skill-template](../skills/make-skill-template/SKILL.md) | Create new Agent Skills for GitHub Copilot from prompts or by duplicating this template. Use when asked to "create a skill", "make a new skill", "scaffold a skill", or when building specialized AI capabilities with bundled resources. Generates SKILL.md files with proper frontmatter, directory structure, and optional scripts/references/assets folders. | None |
 | [markdown-to-html](../skills/markdown-to-html/SKILL.md) | Convert Markdown files to HTML similar to `marked.js`, `pandoc`, `gomarkdown/markdown`, or similar tools; or writing custom script to convert markdown to html and/or working on web template systems like `jekyll/jekyll`, `gohugoio/hugo`, or similar web templating systems that utilize markdown documents, converting them to html. Use when asked to "convert markdown to html", "transform md to html", "render markdown", "generate html from markdown", or when working with .md files and/or web a templating system that converts markdown to HTML output. Supports CLI and Node.js workflows with GFM, CommonMark, and standard Markdown flavors. | `references/basic-markdown-to-html.md`<br />`references/basic-markdown.md`<br />`references/code-blocks-to-html.md`<br />`references/code-blocks.md`<br />`references/collapsed-sections-to-html.md`<br />`references/collapsed-sections.md`<br />`references/gomarkdown.md`<br />`references/hugo.md`<br />`references/jekyll.md`<br />`references/marked.md`<br />`references/pandoc.md`<br />`references/tables-to-html.md`<br />`references/tables.md`<br />`references/writing-mathematical-expressions-to-html.md`<br />`references/writing-mathematical-expressions.md` |
 | [mcp-cli](../skills/mcp-cli/SKILL.md) | Interface for MCP (Model Context Protocol) servers via CLI. Use when you need to interact with external tools, APIs, or data sources through MCP servers, list available MCP servers/tools, or call MCP tools from command line. | None |
-| [mcp-configure](../skills/mcp-configure/SKILL.md) | Configure an MCP server for GitHub Copilot with your Dataverse environment. | None |
 | [mcp-copilot-studio-server-generator](../skills/mcp-copilot-studio-server-generator/SKILL.md) | Generate a complete MCP server implementation optimized for Copilot Studio integration with proper schema constraints and streamable HTTP support | None |
 | [mcp-create-adaptive-cards](../skills/mcp-create-adaptive-cards/SKILL.md) | Skill converted from mcp-create-adaptive-cards.prompt.md | None |
 | [mcp-create-declarative-agent](../skills/mcp-create-declarative-agent/SKILL.md) | Skill converted from mcp-create-declarative-agent.prompt.md | None |