Add support for the DURGOD Taurus K320 keyboard (#11399)

* Initial support for Durgod K320 with BootMagic Lite

- Adding missing files
- Add Unicode Map Support & new user keymap
- Remove personalized features from Default keymap
- Added Unicode Map to both Default and kuenhlee keymap.c
- Updated readme.md
- Added additional Fn Shortcut keys

* Additional support for Durgod K320

- Simplifying default keymap
- Renaming durgod_k320 => durgod/k320
- Removing copy of ST_NUCLEO64_F070RB from K320. Replacing with local board.h
- Adding Mac keyboard layout for K320 as alternative via Fn+F12
- Implementing Windows Key lock on K320
- Cleaning up duplicated core functionality
- Adding default_toggle_mac_windows keymap with:
  - Ability to toggle between Windows and MacOS layout
  - Mac Media Lock functionality.

* Updating K320 keymap readme

Co-authored-by: kuenhlee <eos.camera.lee@gmail.com>

keyboards/durgod/k320/keymaps/kuenhlee/readme.md

@@ -0,0 +1,38 @@
+# The kuenhlee keymap for Durgod Taurus K320.
+
+Layer 0 : Standard ANSI 87 Keys TKL layout
+------------------------------------------
+
+Layer 1 : Media control and Key Modifier for Virtual Desktop navagation
+-----------------------------------------------------------------------
+- Reusing Durgod's Original Media Control for Fn + F1 ~ Fn + F7
+  - Fn + F12 Remapped to Launch Calculator
+  - Fn + M   To Launch Media Player
+  - Fn + P   To Mail Client
+  - Fn + G   To Launch Web Browswer / Nagivate to Homepage
+  - Fn + C   To Launch My Computer
+  - Fn + T   Launch Task Manager
+  - Fn + F   Find in Files ( Notepad ++ )
+
+- Windows's Virtual Desktop Navigation
+  - Fn + Ins    To add New Virtual Desktop
+  - Fn + Del    To Delete / Remove Current Virtual Desktop
+  - Fn + PgUp   Navigate to the Next Virtual Desktop
+  - Fn + PgDn   Navigate to the Previous Virtual Desktop
+  
+- Windows ShortKeys
+  - Fn + Left  Snap Windows to Left
+  - Fn + Right Snap Windows to Right
+  - Fn + Up    Maximize the Window
+  - Fn + Down  Minimize the desktop window
+  - Fn + Home  Select from Cursor to Home
+  - Fn + End   Select from Cursor to End
+  
+Layer 2 : Mainly for Windows Sleep and Shutdown
+-----------------------------------------------
+- Fn + R-ALT + F1 : System Sleep
+- Fn + R-ALT + F4 : Turning Off System
+
+Layer Unicode : Mainly for Predefined Unicode code to work with WinCompose
+--------------------------------------------------------------------------
+- °±²³µ©ΩθΩ√∞∆≈≠→↓←↑≡■□●○∴«»÷≤≥Σ