* Add a RuleCollection object instead of a "loader" module
* Remove legacy loader code
* Remove more legacy loader
* Freeze the default collection
* Change RULE_LOADER default
* Rename to _toml_load_cache
* Use rglob magic
* Typo should've been a string
* Remove no longer needed glob import
* Fix pycharm import bad ordering
* Restore the detection_rules/schemas imports
* Put more imports back for a smaller diff
* Check cache in _deserialize_toml
* Add multi collection and single collection decorators
* Reorder RuleCollection methods
* Move filter method up
* [Rule Tuning] Add empty arrays in place of tactic only threat mappings
* dynamically insert empty technique array in payload
* use replace_id as function parameter
* Restructure commands under more specific click groups
* standardize CLI error handling
* add global debug options
* move es and kibana clients into their click groups
* move commands and groups to dedicated files
* distinguish variable names for better env/config parsing
Ross Wolf