Use different loggers for different log sources

[xmkg]

Currently, searchkit uses the default logger for logging, and there is no distinction between log sources. Searchkit ideally should have its own dedicated loggers, preferably in a reasonable granularity to have better control on logging, e.g. ("searchkit.searchdef", "searchkit.constraints.datesince")

[dosaboy]

@mustafakemalgilor I fixed the issue of using the root logger just recently [1]. I like your suggestion of adding more fine grain loggers.

[1] https://github.com/dosaboy/searchkit/blob/main/searchkit/log.py#L4