ci: system for requesting maintainer action via tags

.github/actions/create-comment/README.md

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+# Create Comment
+
+Create a comment on a pull request or an issue.

.github/actions/create-comment/action.yml

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+name: Create Comment
+description: Create a comment using the provided token
+author: Devolutions Architecture Team
+
+inputs:
+  repo-name:
+    description: "The name of the repository. Example: 'octocat/hello-world'"
+    default: ${{ github.repository }}
+  pr-number:
+    description: The ID of the pull request (/ issue)
+    default: ${{ github.event.number }}
+  branch:
+    description: Name of the branch
+    default: ${{ github.event.pull_request.head.ref }}
+  token:
+    description: GitHub token
+    default: ${{ github.token }}
+  template:
+    description: Message template
+
+runs:
+  using: composite
+
+  steps:
+    - name: Run
+      env:
+        GITHUB_TOKEN: ${{ inputs.token }}
+      shell: pwsh
+      run: ${{ github.action_path }}/run.ps1 -RepoName ${{ inputs.repo-name }} -PullRequestId ${{ inputs.pr-number }} -Branch ${{ inputs.branch }} -Template ${{ inputs.template }}

.github/actions/create-comment/run.ps1

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+#!/bin/env pwsh
+
+param(
+    [Parameter(Mandatory=$true)]
+    [string] $RepoName,
+    [Parameter(Mandatory=$true)]
+    [int] $PullRequestId,
+    [Parameter(Mandatory=$true)]
+    [string] $Branch,
+    [Parameter(Mandatory=$true)]
+    [string] $TemplatePath
+)
+
+$ErrorActionPreference = "Stop"
+
+$MyInvocation.MyCommand.Parameters `
+    | Format-Table -AutoSize `
+        @{ Label = "Argument"; Expression = { $_.Key }; },
+        @{ Label = "Value"; Expression = { try { (Get-Variable -Name $_.Key).Value } catch { "" } }; }
+Write-Host
+
+function Invoke-Cmd
+{
+    param(
+        [Parameter(Mandatory=$true)]
+        [string] $Name,
+        [Parameter(Mandatory=$true)]
+        [string[]] $Args,
+        [switch] $IgnoreFailure
+    )    
+
+    Write-Host ">> Invoke '${Name}' $($Args | Join-String -FormatString '''{0}''' -Separator ' ')"
+
+    # Workaround: temporary change error action preferance because until v7.2 stderr redirection (>2) is redirected to the PowerShell error stream
+    $ErrorActionPreference = "Continue"
+    & $Name $Args 2>&1
+    $ErrorActionPreference = "Stop"
+
+    $failed = $LastExitCode -ne 0
+
+    if ($failed -and (-not $IgnoreFailure))
+    {
+        throw "${Name} invocation failed"
+    }
+}
+
+Write-Host ">> Read template file at $TemplatePath"
+
+$body = Get-Content -Raw -Path "$TemplatePath"
+
+Write-Host '>> Create new comment'
+
+$args = @(
+    'api',
+    '-H', 'Accept: application/vnd.github.v3+json',
+    '-f', "body=$body",
+    '--method', 'POST',
+    "/repos/$RepoName/issues/$PullRequestId/comments"
+)
+
+Invoke-Cmd 'gh' $args | Out-Null
+

.github/comments/pr_greetings.md

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+Let maintainers know that an action is required on their side.
+
+# Maintainer action requested
+
+- Add the label https://github.com/Devolutions/devolutions-gateway/labels/release-required when you request a maintainer to cut a new release a new release (Devolutions Gateway, Devolutions Agent, Jetsocat, PowerShell module)
+
+- Add the label https://github.com/Devolutions/devolutions-gateway/labels/publish-required when you request a maintainer to publish libraries (`Devolutions.Gateway.Utils`, OpenAPI clients, etc)

.github/comments/publish_requested.md

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+Author requested libraries to be published.
+
+cc @CBenoit

.github/comments/release_requested.md

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+Author requested a new release to be cut.
+
+cc @CBenoit

.github/workflows/create-comment.yml

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+name: Create Comment
+
+on:
+  pull_request:
+    branches: [ main ]
+    types: [ opened, labeled ]
+
+jobs:
+  create-comment:
+    name: Create Comment
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./.github/actions/create-comment
+        if: ${{ github.event.action == 'opened'}}
+        template: ${{ github.workspace }}/.github/comments/pr_greetings.md
+
+      - uses: ./.github/actions/create-comment
+        if: ${{ github.event.action == 'labeled' && github.event.label.name == 'publish-required' }}
+        template: ${{ github.workspace }}/.github/comments/publish_requested.md
+
+      - uses: ./.github/actions/create-comment
+        if: ${{ github.event.action == 'labeled' && github.event.label.name == 'release-required' }}
+        template: ${{ github.workspace }}/.github/comments/release_requested.md