[Keyboard] FLX Lodestone (#8451)

* Add Lodestone PCB

Working Firmware for Lodestone PCB tested on physical PCB prototypes.

* Update keyboards/flx/lodestone/lodestone.c

* Update keyboards/flx/lodestone/keymaps/default/config.h

* Update keyboards/flx/lodestone/rules.mk

* Update keyboards/flx/lodestone/readme.md

* Delete config.h

* Update keyboards/flx/lodestone/info.json

Suggested by noroadsleft

* Update keyboards/flx/lodestone/info.json

* Update keyboards/flx/lodestone/info.json

Changed maintainer name as suggested.

* Update keyboards/flx/lodestone/keymaps/default/readme.md

* Update keyboards/flx/lodestone/info.json

* Update keyboards/flx/lodestone/rules.mk

Changed Link_Time_Optimization to LTO didn't know this was a thing :)

* Update keyboards/flx/lodestone/keymaps/default/keymap.c

Removed 2 unessisary layers from the default map.

* Update keyboards/flx/lodestone/readme.md

* Update keyboards/flx/lodestone/info.json

* Changed from LAYOUT to LAYOUT_all

AS suggested by noroadsleft, changed 4 files to match, and re-testeed on my hardware to confirm working.

* Update keyboards/flx/lodestone/config.h

Cleaned up Manu, Product and Descriptor as suggested.

* Update keyboards/flx/lodestone/readme.md

keyboards/flx/lodestone/rules.mk

@@ -0,0 +1,33 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI support
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+LTO_ENABLE = yes