feat: Welcome first time contributors

.github/workflows/welcome-first-time-contrib.yml

@@ -0,0 +1,84 @@
+# Copied from https://github.com/asyncapi/.github/
+
+name: Welcome first time contributors
+
+on:
+  pull_request_target:
+    types:
+      - opened
+  issues:
+    types:
+      - opened
+
+jobs:
+  welcome:
+    name: Post welcome message
+    if: ${{ !contains(fromJson('["dependabot[bot]", "dependabot-preview[bot]", "allcontributors[bot]"]'), github.actor) }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const issueMessage = `Welcome to Springwolf. Thanks a lot for reporting your first issue. Please check out our [contributors guide](https://github.com/springwolf/springwolf-core/blob/master/CONTRIBUTING.md) and feel free to join us on discord.`;
+            const prMessage = `Welcome to Springwolf. Thanks a lot for creating your first pull request. Please check out our [contributors guide](https://github.com/springwolf/springwolf-core/blob/master/CONTRIBUTING.md) and feel free to join us on discord.`;
+            if (!issueMessage && !prMessage) {
+                throw new Error('Action must have at least one of issue-message or pr-message set');
+            }
+            const isIssue = !!context.payload.issue;
+            let isFirstContribution;
+            if (isIssue) {
+                const query = `query($owner:String!, $name:String!, $contributer:String!) {
+                repository(owner:$owner, name:$name){
+                  issues(first: 1, filterBy: {createdBy:$contributer}){
+                    totalCount
+                  }
+                }
+              }`;
+              const variables = {
+                owner: context.repo.owner,
+                name: context.repo.repo,
+                contributer: context.payload.sender.login
+              };
+              const { repository: { issues: { totalCount } } } = await github.graphql(query, variables);
+              isFirstContribution = totalCount === 1;
+            } else {
+                const query = `query($qstr: String!) {
+                  search(query: $qstr, type: ISSUE, first: 1) {
+                     issueCount
+                   }
+                }`;
+              const variables = {
+                "qstr": `repo:${context.repo.owner}/${context.repo.repo} type:pr author:${context.payload.sender.login}`,
+              };
+              const { search: { issueCount } } = await github.graphql(query, variables);
+              isFirstContribution = issueCount === 1;
+            }
+            
+            if (!isFirstContribution) {
+                console.log(`Not the users first contribution.`);
+                return;
+            }
+            const message = isIssue ? issueMessage : prMessage;
+            // Add a comment to the appropriate place
+            if (isIssue) {
+                const issueNumber = context.payload.issue.number;
+                console.log(`Adding message: ${message} to issue #${issueNumber}`);
+                await github.rest.issues.createComment({
+                    owner: context.payload.repository.owner.login,
+                    repo: context.payload.repository.name,
+                    issue_number: issueNumber,
+                    body: message
+                });
+            }
+            else {
+              const pullNumber = context.payload.pull_request.number;
+                console.log(`Adding message: ${message} to pull request #${pullNumber}`);
+                await github.rest.pulls.createReview({
+                    owner: context.payload.repository.owner.login,
+                    repo: context.payload.repository.name,
+                    pull_number: pullNumber,
+                    body: message,
+                    event: 'COMMENT'
+                });
+            }