Add GitHub Actions Workflows To Manage Issues (#1398)

* Add new GitHub Actions workflow to manage new and stale issues

Signed-off-by: Ivan Sim <ivan.sim@kasten.io>

Co-authored-by: Pavan Navarathna <6504783+pavannd1@users.noreply.github.com>

.github/workflows/stale.yaml

@@ -0,0 +1,25 @@
+on:
+  schedule:
+  - cron: "0 0 * * *"
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+    - uses: actions/stale@v5
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        days-before-stale: 60
+        days-before-close: 30
+        close-issue-label: rotten
+        close-pr-label: rotten
+        stale-issue-label: stale
+        stale-pr-label: stale
+        exempt-issue-labels: frozen
+        exempt-pr-labels: frozen
+        close-issue-message: This issue is closed due to inactivity. Feel free to reopen it, if it's still relevant.
+        close-pr-message: This PR is closed due to inactivity. Feel free to reopen it, if it's still relevant.
+        stale-issue-message: This issue is marked as stale due to inactivity. Add a new comment to reactivate it.
+        stale-pr-message: This PR is marked as stale due to inactivity. Add a new comment to reactivate it.

.github/workflows/triage.yaml

@@ -0,0 +1,54 @@
+on:
+  issues:
+    types:
+    - opened
+    - reopened
+  pull_request:
+    types:
+    - opened
+    - reopened
+jobs:
+  issues:
+    if: github.event_name == 'issues'
+    permissions:
+      issues: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions-ecosystem/action-add-labels@v1.1.0
+      with:
+        labels: "triage"
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+    - uses: actions-ecosystem/action-create-comment@v1.0.0
+      if: github.event.action == 'opened'
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        body: |
+          Thanks for opening this issue :+1:. The team will review it shortly.
+
+          If this is a bug report, make sure to include clear instructions how on to reproduce the problem with [minimal reproducible examples](https://stackoverflow.com/help/minimal-reproducible-example), where possible. If this is a security report, please review our security policy as outlined in [SECURITY.md](https://github.com/kanisterio/kanister/blob/master/SECURITY.md).
+
+          If you haven't already, please take a moment to review our project's [Code of Conduct](https://github.com/kanisterio/kanister/blob/master/CODE_OF_CONDUCT.md) document.
+    - uses: alex-page/github-project-automation-plus@v0.8.1
+      with:
+        repo-token: ${{ secrets.GH_TOKEN }} # must use a PAT here
+        project: Kanister
+        column: To Be Triaged
+  pull-requests:
+    if: github.event_name == 'pull_request'
+    permissions:
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions-ecosystem/action-create-comment@v1.0.0
+      if: github.event.action == 'opened'
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        body: |
+          Thanks for submitting this pull request :tada:. The team will review it soon and get back to you.
+
+          If you haven't already, please take a moment to review our project [contributing guideline](https://github.com/kanisterio/kanister/blob/master/CONTRIBUTING.md) and [Code of Conduct](https://github.com/kanisterio/kanister/blob/master/CODE_OF_CONDUCT.md) document.
+    - uses: alex-page/github-project-automation-plus@v0.8.1
+      with:
+        repo-token: ${{ secrets.GH_TOKEN }}
+        project: Kanister
+        column: In Progress