Cfg4py

* lock apscheduler version to 3.9.1. APScheduler 4.0 has been refactored thus cause importing error.

* on apple m1, it's not able to watch file changes, and cause cfg4py fail. This revision will disable hot-reload in such scenario and user can still use all other functions of cfg4py.
* remove support for python 3.6 since it's out of service, and opt 3.10, 3.11 in
* (4) log settings are now available by `cfg.logging`.

* (1) hot-reload will now only react to configuration files's change.

* add strict mode: default is non-strict mode, which allows you run cfg4py without set environment variable __cfg4py_server_role__

this is a **break** change. If you've used cfg4py in your project and it worked well, after upgrade to 0.9.0, you have to modify your init code as this:

python

cfg4py.init('path_to_config_dir', strict = True)

see more in usage and FAQ document

* rename cfg4py_auto_gen.py to schema.py

* support environment macro