added github e2e and tag workflows

.github/workflows/e2e.yaml

@@ -0,0 +1,14 @@
+name: End to End Testing
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  e2e:
+    uses: upbound/uptest/.github/workflows/pr-comment-trigger.yml@main
+    with:
+      package-type: configuration
+    secrets:
+      UPTEST_CLOUD_CREDENTIALS: ${{ secrets.UPTEST_CLOUD_CREDENTIALS }}
+      UPTEST_DATASOURCE: ${{ secrets.UPTEST_DATASOURCE }}

.github/workflows/tag.yml

@@ -0,0 +1,26 @@
+name: Tag
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release version (e.g. v0.1.0)'
+        required: true
+      message:
+        description: 'Tag message'
+        required: true
+
+jobs:
+  create-tag:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Create Tag
+        uses: negz/create-tag@v1
+        with:
+          version: ${{ github.event.inputs.version }}
+          message: ${{ github.event.inputs.message }}
+          token: ${{ secrets.GITHUB_TOKEN }}