ci(build): Introduce digital signing

Author: rabbitstack

.github/workflows/pr.yml

@@ -96,9 +96,24 @@ jobs:
           export VERSION=0.0.0
           ./make.bat pkg
       - uses: actions/upload-artifact@v4
+        id: upload-msi
         with:
           name: "fibratus-amd64.msi"
           path: "./build/msi/fibratus-0.0.0-amd64.msi"
+      - name: Sign MSI
+        uses: signpath/github-action-submit-signing-request@v1
+        with:
+          api-token: "${{ secrets.SIGNPATH_API_TOKEN }}"
+          organization-id: "${{ secrets.SIGNPATH_ORG_ID }}"
+          project-slug: "Fibratus"
+          signing-policy-slug: "test"
+          github-artifact-id: "${{steps.upload-msi.outputs.artifact-id}}"
+          wait-for-completion: true
+          output-artifact-directory: "./build/msi/fibratus-0.0.0-amd64-signed.msi"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: "fibratus-amd64-signed.msi"
+          path: "./build/msi/fibratus-0.0.0-amd64-signed.msi"
 
   test:
     runs-on: windows-latest