Add examples in documentations (#99)

* docs: fix crud

* docs: update README features

* docs: add pagination/search example

* docs: update zensical.toml

* docs: cleanup

* docs: update status to Stable + update description

* docs: add example run commands

docs_src/examples/pagination_search/models.py

@@ -0,0 +1,36 @@
+import datetime
+import uuid
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, func
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class Category(Base):
+    __tablename__ = "categories"
+
+    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
+    name: Mapped[str] = mapped_column(String(64), unique=True)
+
+    articles: Mapped[list["Article"]] = relationship(back_populates="category")
+
+
+class Article(Base):
+    __tablename__ = "articles"
+
+    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
+    created_at: Mapped[datetime.datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now()
+    )
+    title: Mapped[str] = mapped_column(String(256))
+    body: Mapped[str] = mapped_column(Text)
+    status: Mapped[str] = mapped_column(String(32))
+    published: Mapped[bool] = mapped_column(Boolean, default=False)
+    category_id: Mapped[uuid.UUID | None] = mapped_column(
+        ForeignKey("categories.id"), nullable=True
+    )
+
+    category: Mapped["Category | None"] = relationship(back_populates="articles")