FindQuery doesn't support chaining .find() calls for dynamic query building

Description

FindQuery objects don't support chaining .find() calls, which is a common pattern users expect from ORMs like Django. This leads to AttributeError and can be confusing.

Steps to Reproduce

from aredis_om import HashModel, Field, Migrator
import asyncio

class Product(HashModel, index=True):
    name: str = Field(index=True)
    category: str = Field(index=True)
    price: float = Field(index=True)

async def main():
    await Migrator().run()
    
    # This pattern feels natural but doesn't work:
    query = Product.find(Product.category == "electronics")
    query = query.find(Product.price > 100)  # ❌ AttributeError
    results = await query.all()

asyncio.run(main())

Error

AttributeError: 'FindQuery' object has no attribute 'find'

Expected Behavior

Users familiar with Django or SQLAlchemy expect to be able to chain filter calls:

# Django-style (what users expect):
query = Product.find(Product.category == "electronics")
query = query.find(Product.price > 100)
query = query.find(Product.in_stock > 0)
results = await query.all()

Current Workarounds

1. Use & operator to combine expressions

results = await Product.find(
    (Product.category == "electronics") & (Product.price > 100)
).all()

2. Pass multiple expressions to find()

results = await Product.find(
    Product.category == "electronics",
    Product.price > 100
).all()

3. Build a list of filters and unpack

filters = []
if category:
    filters.append(Product.category == category)
if min_price:
    filters.append(Product.price >= min_price)

if filters:
    results = await Product.find(*filters).all()
else:
    results = await Product.find().all()

Proposal

Either:

1. Add .find() method to FindQuery - Allow chaining like Django's QuerySet
2. Add .filter() method to FindQuery - Alternative name that adds conditions
3. Document the correct patterns prominently - If chaining isn't supported, make the correct patterns very visible in docs

Impact

This is a common stumbling block when building dynamic queries (e.g., in API endpoints with optional filters). The workarounds work but aren't discoverable without reading source code or hitting the error.

Environment

• redis-om version: 1.0.0 (current main branch)
• Python version: 3.12

Start at the Product.find entry point and the FindQuery object referenced in the report; inspect how its existing multi-expression and & workarounds are represented. Confirm with maintainers whether chaining, filter(), or documentation is wanted, then add coverage or docs for dynamic filters and verify the chosen behavior with the reported query pattern.