Move namui/src/namui to namui/src #420

Job	Run time
list-projects	22s
run-commands (./namui/namui-prebuilt)	4m 53s
run-commands (./namui/namui-type)	4m 36s
run-commands (./namui/namui-hooks)	4m 51s
run-commands (./namui/skia)	3m 27s
run-commands (./namui/namui-drawer)	4m 51s
run-commands (./namui/sample/bundle)	4m 53s
run-commands (./namui/sample/typography-effect)	3m 28s
run-commands (./namui/sample/register-font)	3m 30s
run-commands (./namui/sample/rect)	3m 34s
run-commands (./namui/sample/mouse)	3m 34s
run-commands (./namui/sample/kv_store)	4m 42s
run-commands (./namui/sample/media)	3m 36s
run-commands (./namui/namui)	4m 38s
post-namui-linux-host-x86_64-pc-windows-msvc	1s
	54m 56s

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