v0.11.0

Changed

• Global env.yaml moved to commands root — the global environment file is now loaded from commands/env.yaml instead of the config root, keeping all command-related configuration under commands/
• Removed global scripts/ directory convention — scripts should live co-located with their command YAML or be referenced via ${VAR} paths

Added

• NIMBLE_COMMANDS_ROOT built-in env var — new variable exposing the absolute path to the commands root directory, completing the path hierarchy (NIMBLE_CONFIG_DIR → NIMBLE_COMMANDS_ROOT → NIMBLE_COMMAND_DIR); available in both script subprocesses and ${VAR} substitution in YAML fields