Shared type definitions for Drizzle ORM

This crate provides common type definitions used across multiple Drizzle crates, including:

• [Dialect] - Database dialect enum (SQLite, PostgreSQL, MySQL)
• SQLite types in the [sqlite] module
• PostgreSQL types in the [postgres] module

Features

• std - Standard library support (enabled by default)
• alloc - Allocator support for no_std environments
• uuid - Enable UUID type support
• serde - Enable serde serialization/deserialization
• chrono - Enable chrono date/time type support
• time - Enable time crate type support
• geo-types - Enable geometric type support
• cidr - Enable network address type support
• bit-vec - Enable bit vector type support