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>

security.py

@@ -553,14 +553,23 @@ def get_org_config_path() -> Path:
     Get the organization-level config file path.
 
     Returns:
-        Path to ~/.autocoder/config.yaml
+        Path to ~/.autoforge/config.yaml (falls back to ~/.autocoder/config.yaml)
     """
-    return Path.home() / ".autocoder" / "config.yaml"
+    new_path = Path.home() / ".autoforge" / "config.yaml"
+    if new_path.exists():
+        return new_path
+    # Backward compatibility: check old location
+    old_path = Path.home() / ".autocoder" / "config.yaml"
+    if old_path.exists():
+        return old_path
+    return new_path
 
 
 def load_org_config() -> Optional[dict]:
     """
-    Load organization-level config from ~/.autocoder/config.yaml.
+    Load organization-level config from ~/.autoforge/config.yaml.
+
+    Falls back to ~/.autocoder/config.yaml for backward compatibility.
 
     Returns:
         Dict with parsed org config, or None if file doesn't exist or is invalid
@@ -630,7 +639,10 @@ def load_project_commands(project_dir: Path) -> Optional[dict]:
     Returns:
         Dict with parsed YAML config, or None if file doesn't exist or is invalid
     """
-    config_path = project_dir.resolve() / ".autocoder" / "allowed_commands.yaml"
+    # Check new location first, fall back to old for backward compatibility
+    config_path = project_dir.resolve() / ".autoforge" / "allowed_commands.yaml"
+    if not config_path.exists():
+        config_path = project_dir.resolve() / ".autocoder" / "allowed_commands.yaml"
 
     if not config_path.exists():
         return None
@@ -909,7 +921,7 @@ async def bash_security_hook(input_data, tool_use_id=None, context=None):
             # Provide helpful error message with config hint
             error_msg = f"Command '{cmd}' is not allowed.\n"
             error_msg += "To allow this command:\n"
-            error_msg += "  1. Add to .autocoder/allowed_commands.yaml for this project, OR\n"
+            error_msg += "  1. Add to .autoforge/allowed_commands.yaml for this project, OR\n"
             error_msg += "  2. Request mid-session approval (the agent can ask)\n"
             error_msg += "Note: Some commands are blocked at org-level and cannot be overridden."
             return {