chore: add copilot submit pr infra

Author: JohannesRudolph

.github/copilot-instructions.md

@@ -38,3 +38,8 @@ Do not commit if either command fails.
 - `static/` - Static assets
 - `src/` - Source code
 - `docusaurus.config.ts` - Main configuration
+
+## Slash Commands
+
+When you are invoked from a github issue comment, you MUST ALWAYS react to slash commands of the form `/command`.
+For a slash command, locate and execute the corresponding prompt file in `.github/prompts/$command.prompt.md`

.github/prompts/submit-docs-pr.prompt.md

@@ -0,0 +1,29 @@
+---
+mode: 'agent'
+---
+
+You are operating on a downstream repository called `meshcloud/meshcloud-docs-staging` which is forked from the upstream
+repository `meshcloud/meshcloud-docs`. You are working in the context of a pull request on the downstream repository.
+
+You must submit the changes you made to the upstream repository as a pull request.
+
+Execute the following command to push the current branch to the upstream repository
+
+```sh
+git push --set-upstream upstream $(git branch --show-current)
+```
+
+After pushing the branch, you can create a pull request using the `create_pull_request` tool. 
+Use the following inputs for the tool call:
+
+```
+body: <PR description>
+title: <PR title>
+draft: true
+base: develop
+head: $(git branch --show-current)
+owner: meshcloud
+repo: meshcloud-docs
+```
+
+Create the <PR description> and <PR title> from the context of the changes you made in the downstream pull request.

.github/workflows/copilot-setup-steps.yml

@@ -21,6 +21,14 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Ensure all history is fetched for Copilot to work correctly
+          token: ${{ secrets.COPILOT_MCP_GITHUB_PERSONAL_ACCESS_TOKEN }}
+     
+      - name: Set up git remote for meshcloud-docs
+        run: |
+          git remote -v
+          git remote add upstream https://github.com/meshcloud/meshcloud-docs
 
       - name: Set up Node.js
         uses: actions/setup-node@v4
@@ -32,4 +40,3 @@ jobs:
       - name: Install dependencies
         run: yarn install --frozen-lockfile
 
-