Add action to auto close inactive issues as per our triage policy

.github/workflows/stale.yml

@@ -0,0 +1,19 @@
+name: 'Close stale issues and PRs'
+
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 7 days with no activity after asking for more info. Comment or this will be closed in 4 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 10 days with no activity. This can be reopened if additional information is provided.'
+          days-before-issue-stale: 10          
+          days-before-issue-close: 4
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          any-of-labels: "needs-more-info"

sign.sln

@@ -20,6 +20,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		NuGet.Config = NuGet.Config
 		SdkTools.props = SdkTools.props
 		SECURITY.md = SECURITY.md
+		.github\workflows\stale.yml = .github\workflows\stale.yml
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sign.Core", "src\Sign.Core\Sign.Core.csproj", "{8781DB2C-CF89-456D-BE9D-D7EF8333F5EC}"