Custom lookup feature?

I would like to request support for custom lookups in, similar to Django's implementation.

@fields.CharField.register_lookup
class MyCustomLookup(Lookup):
    lookup_name = 'my_custom'

    def as_sql(self, compiler, connection):
        lhs, lhs_params = compiler.compile(self.lhs)
        rhs, rhs_params = compiler.compile(self.rhs)
        params = lhs_params + rhs_params
        return '%s MY_OPERATOR %s' % (lhs, rhs), params

Model.filter(name__my_custom='test')

Start with the custom lookup registration example, including Lookup, as_sql, and Model.filter(name__my_custom='test'), then compare the referenced Django behavior with Tortoise ORM's query API. Done would require an agreed design for registration, SQL compilation, and lookup invocation; the issue names no repository files or tests.