feat(orchestrator): enterprise feature support — CLI provider, submodule profiles, caching, LFS, hooks

Add generic enterprise-grade features to the orchestrator, enabling Unity projects with
complex CI/CD pipelines to adopt game-ci/unity-builder with built-in support for:

- CLI provider protocol: JSON-over-stdin/stdout bridge enabling providers in any language
  (Go, Python, Rust, shell) via the `providerExecutable` input
- Submodule profiles: YAML-based selective submodule initialization with glob patterns
  and variant overlays (`submoduleProfilePath`, `submoduleVariantPath`)
- Local build caching: Filesystem-based Library and LFS caching for local builds without
  external cache actions (`localCacheEnabled`, `localCacheRoot`)
- Custom LFS transfer agents: Register external transfer agents like elastic-git-storage
  (`lfsTransferAgent`, `lfsTransferAgentArgs`, `lfsStoragePaths`)
- Git hooks support: Detect and install lefthook/husky with configurable skip lists
  (`gitHooksEnabled`, `gitHooksSkipList`)

Also removes all `orchestrator-develop` branch references, replacing with `main`.

13 new action inputs, 13 new files, 14 new CLI provider tests, 17 submodule tests,
plus cache/LFS/hooks unit tests. All 452 tests pass.

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

src/model/build-parameters.ts

@@ -106,6 +106,19 @@ class BuildParameters {
   public cacheUnityInstallationOnMac!: boolean;
   public unityHubVersionOnMac!: string;
   public dockerWorkspacePath!: string;
+  public submoduleProfilePath!: string;
+  public submoduleVariantPath!: string;
+  public submoduleToken!: string;
+  public localCacheEnabled!: boolean;
+  public localCacheRoot!: string;
+  public localCacheLibrary!: boolean;
+  public localCacheLfs!: boolean;
+  public lfsTransferAgent!: string;
+  public lfsTransferAgentArgs!: string;
+  public lfsStoragePaths!: string;
+  public gitHooksEnabled!: boolean;
+  public gitHooksSkipList!: string;
+  public providerExecutable!: string;
 
   public static shouldUseRetainedWorkspaceMode(buildParameters: BuildParameters) {
     return buildParameters.maxRetainedWorkspaces > 0 && Orchestrator.lockedWorkspace !== ``;
@@ -242,6 +255,19 @@ class BuildParameters {
       cacheUnityInstallationOnMac: Input.cacheUnityInstallationOnMac,
       unityHubVersionOnMac: Input.unityHubVersionOnMac,
       dockerWorkspacePath: Input.dockerWorkspacePath,
+      submoduleProfilePath: Input.submoduleProfilePath,
+      submoduleVariantPath: Input.submoduleVariantPath,
+      submoduleToken: Input.submoduleToken,
+      localCacheEnabled: Input.localCacheEnabled,
+      localCacheRoot: Input.localCacheRoot,
+      localCacheLibrary: Input.localCacheLibrary,
+      localCacheLfs: Input.localCacheLfs,
+      lfsTransferAgent: Input.lfsTransferAgent,
+      lfsTransferAgentArgs: Input.lfsTransferAgentArgs,
+      lfsStoragePaths: Input.lfsStoragePaths,
+      gitHooksEnabled: Input.gitHooksEnabled,
+      gitHooksSkipList: Input.gitHooksSkipList,
+      providerExecutable: Input.providerExecutable,
     };
   }