feat: welcome first contributors when PR opens (#2236)

Co-authored-by: Willow (GHOST) <git@willow.sh>

Author: trueberryless

.github/workflows/welcome.yml .github/workflows/welcome-close.yml.github/workflows/welcome.yml renamed to .github/workflows/welcome-close.yml

@@ -1,4 +1,4 @@
-name: welcome
+name: Claim Contributor Message
 
 on:
   pull_request_target:

.github/workflows/welcome-open.yml

@@ -0,0 +1,31 @@
+name: Welcome Message
+
+on:
+  pull_request_target:
+    branches: [main]
+    types: [opened]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  greeting:
+    name: Greet First-Time Contributors
+    if: github.repository == 'npmx-dev/npmx.dev'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: zephyrproject-rtos/action-first-interaction@58853996b1ac504b8e0f6964301f369d2bb22e5c
+        with:
+          pr-opened-message: |
+            Hello! Thank you for opening your **first PR** to npmx, @${{ github.event.pull_request.user.login }}! 🚀
+
+            Here’s what will happen next:
+
+            1. Our GitHub bots will run to check your changes.
+               If they spot any issues you will see some error messages on this PR.
+               Don’t hesitate to ask any questions if you’re not sure what these mean!
+
+            2. In a few minutes, you’ll be able to see a preview of your changes on Vercel
+
+            3. One or more of our maintainers will take a look and may ask you to make changes.
+               We try to be responsive, but don’t worry if this takes a few days.