feat: initialize frontend with React and Vite setup

- Add main application structure with App component
- Implement state management for counter functionality
- Create CSS styles for application layout and components
- Include assets for logos and hero image
- Set up Vite configuration for development environment
- Establish global CSS variables for theming

backend/app/db/models.py

@@ -0,0 +1,28 @@
+from sqlalchemy import Column, String, Boolean, Integer, DateTime, Text
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+from .session import Base
+import uuid
+
+class Researcher(Base):
+    __tablename__ = "researchers"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    orcid_id = Column(String(19), unique=True, nullable=False)
+    name = Column(Text)
+    authenticated = Column(Boolean, default=False)
+    access_token = Column(Text)
+    last_sync_at = Column(DateTime)
+
+class Publication(Base):
+    __tablename__ = "publications"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    researcher_id = Column(UUID(as_uuid=True))
+    put_code = Column(Integer)
+    title = Column(Text)
+    doi = Column(Text)
+    pub_year = Column(Integer)
+    type = Column(Text)
+    hash_fingerprint = Column(Text)
+    last_modified = Column(DateTime)