Refactor logging for behaviors

[bryanforbes]

I've refactored the logging in behaviors to be more granular with the goal being to eventually use more granular logging everywhere. The refactor is as follows:

• Added CONFIG_ZMK_BEHAVIORS_LOG_LEVEL which, if unset, inherits the log level from CONFIG_ZMK_LOG_LEVEL (behavior.c and behavior_queue.c use this log level)
• Added CONFIG_ZMK_BEHAVIOR_*_LOG_LEVEL for each behavior which, if unset, inherit from CONFIG_ZMK_BEHAVIORS_LOG_LEVEL
• Ensured the behavior logging options show up as a sub-menu in menuconfig

With these additions, a developer can do the following:

• Completely turn off all behavior logging by setting CONFIG_ZMK_BEHAVIORS_LOG_LEVEL_OFF=y
• Only get logging for individual behaviors, such as caps word, by setting CONFIG_ZMK_BEHAVIORS_LOG_LEVEL_OFF=y and CONFIG_ZMK_BEHAVIOR_CAPS_WORD_LOG_LEVEL_DBG=y

[caksoylar]

I would wait for input on the idea/implementation from others before committing to doing it, but I'll drop this note: This would need docs updates for the new behavior guide and possibly some pointers in the USB logging page.