API: Expose permission_hierarchy read only via generic entity interactions (closes #2662)

changelog/79_UNRELEASED_xx-xx-xxxx.md

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+> ⚠️ xxxBREAKING CHANGESxxx
+
+> ❗ xxxImportant upgrade informationXXX
+
+> 💡 xxxMinor upgrade informationXXX
+
+### New Feature: xxxx
+
+- xxx
+
+### Stock
+
+- xxx
+
+### Shopping list
+
+- xxx
+
+### Recipes
+
+- xxx
+
+### Meal plan
+
+- xxx
+
+### Chores
+
+- xxx
+
+### Calendar
+
+- xxx
+
+### Tasks
+
+- xxx
+
+### Batteries
+
+- xxx
+
+### Equipment
+
+- xxx
+
+### Userfields
+
+- xxx
+
+### General
+
+- xxx
+
+### API
+
+- Exposed the `permission_hierarchy` entity (read only, => `GET /objects/permission_hierarchy`) to provide a permission name / id mapping