Morebuiltins

2. add `functools.RotatingFileWriter`
1. prepare for `log_server` with `asyncio` + `ipc.SocketLogHandlerEncoder`

1. add `sqlite.KV`: A key-value store using sqlite3. Light-weight `sqlitedict`.

1. Change the default alphabet in `utils.base_encode` to "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", which follows the order of ASCII characters.
2. add `utils.SnowFlake` for id generator

1. add `utils.get_size` to get size of objects recursively.
2. add `base_encode, base_decode, gen_id, timeti` to `utils`
3. add alias for AsyncQueueListener: `functools.async_logger`

1. add `snippets.sql.SqliteSQL` as Sqlite SQL generator
2. add `cmd.parse_deps` to parse dependencies of a project directory, and find circular dependencies.
3. add `cmd.os.linux.systemd.service` and `cmd.os.linux.systemd.timer`
4. add `functools.to_thread`, same as `asyncio.to_thread` in python 3.9+.
5. add `functools.AsyncQueueListener` for asyncio non-block logging.
6. fix systemd.timer typing hint error

1. add `utils.i2b` and `utils.b2i`, integer and fixed-length byte strings conversion.
2. add `--compress` to `cmd.log_server`
3. add `snippets.event.EventTemplate`