[Keymap] My DZ60 Layout and files (#7537)

* I don't know if this is how my keyboard is laid out or not

* testing, still broken

* name change

* I think this is the layout I will try to use to start

* it compiles!

* added norman layout!

* media keys

* Moved backlight functions to KEYB
Moved Delete off of Backspace and to the < key

* more changes to layout, move Norman to 1 so it was moddable by FCTN

* swapped volume and media, I use volume a lot more than media

* Eh, it's still all in flux.

* I don't want the entire function layer full of dead keys, after all...

* moves escape to the caps lock key and caps lock to the functions layer

* update my readme for posterity

* Updates bonfire dz60 for better escape control

* WIP commit -- this is not working yet

* updates keymap for GAME layer
adds info to README
adds visual keyboard layout map in json and jpg for reference

* updates readme for visual keymap insertion

* removes my layout from the parent folder and keeps it localized

* updates the C code to be more readable

* finished the HELD_ESCAPE code

* finishes v6.1.0

* updates layout names to match repo code style per @mechmerlin

Apply suggestions from code review

* updates to code style per suggestions by @mechmerlin

* Update global-functions.c

updates some personal documentation

* updates hold time for escape on gaming layer

* updates several aspects of the code based on PR requests

* moves a variable

keyboards/dz60/keymaps/_bonfire/keymap-parts/defs.c

@@ -0,0 +1,29 @@
+/**
+ * Variables
+ * 
+ */
+int held_esc_threshold = 230;
+bool is_esc_held = false;
+uint16_t held_esc_timer = 0;
+
+/**
+ * Define Layers
+ */
+enum layers {
+    BASE = 0,
+    NRMN,
+    GAME,
+    FCTN,
+    KEYB
+};
+
+/**
+ * Define Custom Keycodes
+ */
+enum custom_keycodes { 
+    HLD_ESC = SAFE_RANGE,
+    MOD_UP = MT(MOD_RSFT, KC_UP),
+    MOD_RT = MT(MOD_HYPR, KC_RIGHT),
+    MOD_DN = MT(MOD_RCTL, KC_DOWN),
+    MOD_LT = MT(MOD_RGUI, KC_LEFT)
+};