feat(orchestrator): CI platform providers — Remote PowerShell, GitHub Actions, GitLab CI, Ansible

Add four new providers that delegate builds to external CI platforms:
- remote-powershell: Execute on remote machines via WinRM/SSH
- github-actions: Dispatch workflow_dispatch on target repository
- gitlab-ci: Trigger pipeline via GitLab API
- ansible: Run playbooks against managed inventory

Each follows the CI-as-a-provider pattern: trigger remote job,
pass build parameters, stream logs, report status.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/model/input.ts

@@ -282,6 +282,82 @@ class Input {
     return Input.getInput('skipActivation')?.toLowerCase() ?? 'false';
   }
 
+  // ### ### ###
+  // Remote PowerShell provider
+  // ### ### ###
+
+  static get remotePowershellHost(): string {
+    return Input.getInput('remotePowershellHost') ?? '';
+  }
+
+  static get remotePowershellCredential(): string {
+    return Input.getInput('remotePowershellCredential') ?? '';
+  }
+
+  static get remotePowershellTransport(): string {
+    return Input.getInput('remotePowershellTransport') ?? 'wsman';
+  }
+
+  // ### ### ###
+  // GitHub Actions provider
+  // ### ### ###
+
+  static get githubActionsRepo(): string {
+    return Input.getInput('githubActionsRepo') ?? '';
+  }
+
+  static get githubActionsWorkflow(): string {
+    return Input.getInput('githubActionsWorkflow') ?? '';
+  }
+
+  static get githubActionsToken(): string {
+    return Input.getInput('githubActionsToken') ?? '';
+  }
+
+  static get githubActionsRef(): string {
+    return Input.getInput('githubActionsRef') ?? 'main';
+  }
+
+  // ### ### ###
+  // GitLab CI provider
+  // ### ### ###
+
+  static get gitlabProjectId(): string {
+    return Input.getInput('gitlabProjectId') ?? '';
+  }
+
+  static get gitlabTriggerToken(): string {
+    return Input.getInput('gitlabTriggerToken') ?? '';
+  }
+
+  static get gitlabApiUrl(): string {
+    return Input.getInput('gitlabApiUrl') ?? 'https://gitlab.com';
+  }
+
+  static get gitlabRef(): string {
+    return Input.getInput('gitlabRef') ?? 'main';
+  }
+
+  // ### ### ###
+  // Ansible provider
+  // ### ### ###
+
+  static get ansibleInventory(): string {
+    return Input.getInput('ansibleInventory') ?? '';
+  }
+
+  static get ansiblePlaybook(): string {
+    return Input.getInput('ansiblePlaybook') ?? '';
+  }
+
+  static get ansibleExtraVars(): string {
+    return Input.getInput('ansibleExtraVars') ?? '';
+  }
+
+  static get ansibleVaultPassword(): string {
+    return Input.getInput('ansibleVaultPassword') ?? '';
+  }
+
   public static ToEnvVarFormat(input: string) {
     if (input.toUpperCase() === input) {
       return input;