feat: Implement person and tag management services

- Added `Person` and `Tag` models to the core library.
- Created `PersonService` and `TagService` traits with implementations for managing persons and tags.
- Introduced repositories for `Person`, `Tag`, `FaceRegion`, and `PersonShare` with PostgreSQL support.
- Updated authorization logic to include permissions for accessing and editing persons.
- Enhanced the schema to support new models and relationships.
- Implemented database migrations for new tables related to persons and tags.
- Added request and response structures for API interactions with persons and tags.

libertas_api/migrations/20251115085440_create_people_table.sql

@@ -0,0 +1,21 @@
+CREATE TABLE people (
+    id UUID PRIMARY KEY,
+    owner_id UUID NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    name TEXT NOT NULL
+);
+
+
+CREATE TABLE face_regions (
+    id UUID PRIMARY KEY,
+    media_id UUID NOT NULL REFERENCES media (id) ON DELETE CASCADE,
+    person_id UUID REFERENCES people (id) ON DELETE SET NULL,
+    
+    x_min REAL NOT NULL,
+    y_min REAL NOT NULL,
+    x_max REAL NOT NULL,
+    y_max REAL NOT NULL
+);
+
+CREATE INDEX idx_people_owner_id ON people (owner_id);
+CREATE INDEX idx_face_regions_media_id ON face_regions (media_id);
+CREATE INDEX idx_face_regions_person_id ON face_regions (person_id);