feat: use krew-release-bot to automate releasing new version to krew-…

…index (#194)

# Description

As title
## Related Issue

#108

## Checklist

- [x] I have read the [contributing
documantation](https://retina.sh/docs/contributing).
- [x] I signed and signed-off the commits (`git commit -S -s ...`)
- [x] I have correctly attributed the author(s) of the code.
- [x] I have tested the changes locally.
- [x] I have followed the project's style guidelines.
- [x] I have updated the documentation, if necessary.
- [x] I have added tests, if applicable.

## Screenshots (if applicable)

Please add any relevant screenshots or GIFs to showcase the changes
made.

## Additional Notes

Add any additional notes or context about the pull request here.

---

Please refer to the [CONTRIBUTING.md](../CONTRIBUTING.md) file for more
information on how to contribute to this project.

.github/workflows/goreleaser.yaml

@@ -48,3 +48,5 @@ jobs:
           args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Update new version in krew-index
+        uses: rajatjindal/[email protected]

.krew.yaml

@@ -0,0 +1,53 @@
+apiVersion: krew.googlecontainertools.github.com/v1alpha2
+kind: Plugin
+metadata:
+  name: retina
+spec:
+  version: {{ .TagName }}
+  homepage: https://github.com/microsoft/retina
+  shortDescription: Distributed network captures and telemetry
+  description: |
+    The Retina CLI plugin enables users to collect distributed network captures in an
+    OS and vendor-agnostic way. Capture jobs can be created via the CLI to target specific
+    nodes or pods in a time-limited or size limited way. Capture jobs can also filter specific
+    network traffic based on the given configurations; more info on the configurations can be 
+    found on the official docs. The captures are collected in formats like pcap, etl and 
+    text files, and can then be stored at remote storage destinations.
+  platforms:
+  - selector:
+      matchLabels:
+        os: darwin
+        arch: amd64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-darwin-amd64-{{ .TagName }}.tar.gz" .TagName }}
+    bin: kubectl-retina-darwin-amd64
+  - selector:
+      matchLabels:
+        os: darwin
+        arch: arm64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-darwin-arm64-{{ .TagName }}.tar.gz" .TagName }}
+    bin: kubectl-retina-darwin-arm64
+  - selector:
+      matchLabels:
+        os: linux
+        arch: amd64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-linux-amd64-{{ .TagName }}.tar.gz" .TagName }}
+    bin: kubectl-retina-linux-amd64
+  - selector:
+      matchLabels:
+        os: linux
+        arch: arm64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-linux-arm64-{{ .TagName }}.tar.gz" .TagName }}
+    bin: kubectl-retina-linux-arm64
+  - selector:
+      matchLabels:
+        os: windows
+        arch: amd64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-windows-amd64-{{ .TagName }}.zip" .TagName }}
+    bin: kubectl-retina-windows-amd64.exe
+  - selector:
+      matchLabels:
+        os: windows
+        arch: arm64
+    {{addURIAndSha "https://github.com/microsoft/retina/releases/download/{{ .TagName }}/kubectl-retina-windows-arm64-{{ .TagName }}.zip" .TagName }}
+    bin: kubectl-retina-windows-arm64.exe
+