[Keymap] Add personal keymap for Planck (#9424)

* Create readme.md

* Add personal keymap

* Edit readme

* Reorganize layouts

* Update config.h

* Edit beep settings

* Apply suggestions from code review

* More suggestions from code review

keyboards/planck/keymaps/charlesrocket/rules.mk

@@ -0,0 +1,8 @@
+SRC += muse.c
+# Set any rules.mk overrides for your specific keymap here.
+# See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
+LTO_ENABLE = yes
+COMMAND_ENABLE = no
+MOUSEKEY_ENABLE = no
+WEBUSB_ENABLE = yes
+ORYX_ENABLE = yes