Add database code. Starting with birthday table.

database/models.py

@@ -0,0 +1,20 @@
+"""File holds all model definitions of SQL tables."""
+
+from sqlalchemy.dialects.mysql import BIGINT, SMALLINT
+from sqlmodel import Column, Field, SQLModel
+
+
+class UserBirthday(SQLModel, table=True):
+    """
+    Represents a user's birthday.
+
+    Attributes:
+        user_id: The user's discord id. Primary key.
+        month: The month the user was born.
+        day: The day the user was born.
+
+    """
+
+    user_id: int = Field(sa_column=Column(BIGINT(unsigned=True), primary_key=True, nullable=False))
+    month: int = Field(sa_column=Column(SMALLINT(unsigned=True), nullable=False))
+    day: int = Field(sa_column=Column(SMALLINT(unsigned=True), nullable=False))