* Refactored raw SQLs and outdated APIs to use newer DB + QB APIs
* Simplified Python & Query logic
* Added type hints
* Styled with Black

perf: dont cache `assets_json` in Redis for `developer_mode`

* Deprecate filter_str in whitelisted get_monthly_goal_graph_data API;
  use filter Dict instead
* Simplify logic
* Use qb notation instead of raw SQLs
* Raise 403 if user does not have access to document

Note: This includes a security fix

fix: incorrect logic for `parenttype` parameter in `get_all_children`

perf: cache parsed `assets_json` instead of string

Via https://github.com/frappe/frappe/pull/16107

fix: issue with collapsible section

fix!: Remove dead functionality

fix: update translation

fix!: ignore `DoesNotExistError` inside `get_cached_value`

Removed because it's a long forgotten, unused module that seems to be straight up
broken

The feature has been removed from Core since it doesn't add any value to
the system, is unmaintained, partially developed and undocumented.