Add some TODOs to the toplevel readme.
This project is a complete work in progress, with absolutely nothing functioning yet. The goal is to explore a new MK firmware
with a less restritive license and better BLE support, built on top of the [Zephyr Project](https://www.zephyrproject.org/)
+## TODO
+
+- Debouncing in the kscan driver itself? Only some GPIO drivers in Zephyr support it "natively"
+- Better DTS overlay setup for _keymaps_. Current use of SHIELDs works, but perhaps would be better with something more integrated.
+- Move most Kconfig setings to the board/keymap defconfigs and out of the toplevel `prj.conf` file.
+- Merge the Kscan GPIO driver upstream, or integrate it locally, to avoid use of Zephyr branch.
+- BLE SC by typing in the # prompted on the host.
+ - Store the connection being authenticated.
+ - Hook into endpoint flow to detect keypresses and store/send them to the connection once 6 are typed.
+- Display support, including displaying BLE SC auth numbers for "numeric comparison" mode if we have the screen.
+- Fix BT settings to work w/ Zephyr. Do we really need them?
+- Tests?
+
+## Long Term
+
+- Tool to convert keymap `info.json` files into a DTS keymap file?
+- Firmware build service?
