actions: add PR size labeler

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/pr_size.yaml

@@ -0,0 +1,28 @@
+name: size labeler
+
+on: [pull_request]
+
+jobs:
+	labeler:
+		runs-on: ubuntu-latest
+		name: Label the PR size
+		steps:
+			- uses: codelytv/pr-size-labeler@v1
+				with:
+					GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+					xs_label: 'size: XS'
+					xs_max_size: '10'
+					s_label: 'size: S'
+					s_max_size: '100'
+					m_label: 'size: M'
+					m_max_size: '500'
+					l_label: 'size: L'
+					l_max_size: '1000'
+					xl_label: 'size: XL'
+					fail_if_xl: 'false'
+					message_if_xl: >
+						This PR exceeds the recommended size of 1000 lines.
+						Please make sure you are NOT addressing multiple issues with one PR.
+						Note this PR might be rejected due to its size.
+					github_api_url: 'https://api.github.com'
+					files_to_ignore: ''