sqlite support

[JasonShin]

No description provided.

[Copilot]

Pull request overview

Adds first-class SQLite support to sqlx-ts, enabling validation and TS type generation against SQLite databases alongside existing Postgres/MySQL support.

Changes:

• Introduces SQLite connection pooling + query validation path in core and wires it through shared connection/config code.
• Adds SQLite schema introspection and SQLite-specific SQL parsing/type-affinity mapping for TS generation.
• Adds SQLite-focused integration tests for ? parameters and type output.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
tests/sqlite_query_parameters.rs	New integration tests covering SQLite ? parameters, result typing, and invalid SQL handling.
test-utils/src/sandbox.rs	Extends test harness to allow running the CLI without host/user/pass when db_type=sqlite.
src/ts_generator/types/ts_query.rs	Adds SQLite column-type-affinity → TS type mapping.
src/ts_generator/information_schema.rs	Adds SQLite table introspection via PRAGMA table_info and integrates into DBSchema::fetch_table.
src/ts_generator/generator.rs	Uses sqlparser’s SQLiteDialect when generating types for SQLite connections.
src/core/sqlite/prepare.rs	Adds SQLite query validation implementation (currently via EXPLAIN).
src/core/sqlite/pool.rs	Adds bb8 manager for SQLite using rusqlite connections.
src/core/sqlite/mod.rs	Exposes SQLite core modules.
src/core/mod.rs	Registers core::sqlite module.
src/core/connection.rs	Adds DBConn::SqliteConn and routes prepare()/get_db_type() accordingly.
src/common/types.rs	Adds DatabaseType::Sqlite.
src/common/lazy.rs	Creates and caches SQLite pools from config.
src/common/dotenv.rs	Parses DB_TYPE=sqlite from .env.
src/common/config.rs	Adjusts default-connection config rules for SQLite and adds get_sqlite_path().
Cargo.toml	Adds rusqlite dependency (and duplicates it in dev-deps).
Cargo.lock	Locks new rusqlite/sqlite transitive dependencies.

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