rebrand: rename AutoCoder to AutoForge across entire codebase

Complete project rebrand from AutoCoder to AutoForge, touching 62 files
across Python backend, FastAPI server, React UI, documentation, config,
and CI/CD.

Key changes:
- Rename autocoder_paths.py -> autoforge_paths.py with backward-compat
  migration from .autocoder/ -> .autoforge/ directories
- Update registry.py to migrate ~/.autocoder/ -> ~/.autoforge/ global
  config directory with fallback support
- Update security.py with fallback reads from legacy .autocoder/ paths
- Rename .claude/commands and skills from gsd-to-autocoder-spec to
  gsd-to-autoforge-spec
- Update all Python modules: client, prompts, progress, agent,
  orchestrator, server routers and services
- Update React UI: package.json name, index.html title, localStorage
  keys, all documentation sections, component references
- Update start scripts (bat/sh/py), examples, and .env.example
- Update CLAUDE.md and README.md with new branding and paths
- Update test files for new .autoforge/ directory structure
- Transfer git remote from leonvanzyl/autocoder to
  AutoForgeAI/autoforge

Backward compatibility preserved: legacy .autocoder/ directories are
auto-detected and migrated on next agent start. Config fallback chain
checks both new and old paths.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

prompts.py

@@ -19,7 +19,7 @@ TEMPLATES_DIR = Path(__file__).parent / ".claude" / "templates"
 
 def get_project_prompts_dir(project_dir: Path) -> Path:
     """Get the prompts directory for a specific project."""
-    from autocoder_paths import get_prompts_dir
+    from autoforge_paths import get_prompts_dir
     return get_prompts_dir(project_dir)
 
 
@@ -315,9 +315,9 @@ def scaffold_project_prompts(project_dir: Path) -> Path:
     project_prompts = get_project_prompts_dir(project_dir)
     project_prompts.mkdir(parents=True, exist_ok=True)
 
-    # Create .autocoder directory with .gitignore for runtime files
-    from autocoder_paths import ensure_autocoder_dir
-    autocoder_dir = ensure_autocoder_dir(project_dir)
+    # Create .autoforge directory with .gitignore for runtime files
+    from autoforge_paths import ensure_autoforge_dir
+    autoforge_dir = ensure_autoforge_dir(project_dir)
 
     # Define template mappings: (source_template, destination_name)
     templates = [
@@ -340,14 +340,14 @@ def scaffold_project_prompts(project_dir: Path) -> Path:
             except (OSError, PermissionError) as e:
                 print(f"  Warning: Could not copy {dest_name}: {e}")
 
-    # Copy allowed_commands.yaml template to .autocoder/
+    # Copy allowed_commands.yaml template to .autoforge/
     examples_dir = Path(__file__).parent / "examples"
     allowed_commands_template = examples_dir / "project_allowed_commands.yaml"
-    allowed_commands_dest = autocoder_dir / "allowed_commands.yaml"
+    allowed_commands_dest = autoforge_dir / "allowed_commands.yaml"
     if allowed_commands_template.exists() and not allowed_commands_dest.exists():
         try:
             shutil.copy(allowed_commands_template, allowed_commands_dest)
-            copied_files.append(".autocoder/allowed_commands.yaml")
+            copied_files.append(".autoforge/allowed_commands.yaml")
         except (OSError, PermissionError) as e:
             print(f"  Warning: Could not copy allowed_commands.yaml: {e}")