feat: owloysius - dynamic init function invocator

refactor: add a generic base struct to devices
	  this allow us to specialize different kinds of device,
	  sparating devfs tree node and real device, to save the overhead
feat: add device aliasing (i.e. hard link in devfs)
feat: add new gdb command to dump system log
feat: make default system console configurable through `console=<dev>` boot command line
fix: trying to delete mount point when unmounted.
fix: ensure frame-point always included regardless optimization level
chore: edit readme
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