Add personal userspace, update keymaps (#4845)

* Add kbd6x:konstantin keymap

* Prevent tap dance from sending LShift as a weak mod in KBD6X

* Move config.h and rules.mk definitions into userspace

* Add UC_WIN to UNICODE_SELECTED_MODES

* Temporarily use Bootmagic until Command is fixed

* Move common behavior from keyboards into userspace

* Update kbd6x:konstantin keymap and userspace

* Make a RCTRL layer in kbd6x:konstantin

* Make KC_ESC turn off layers

* KC_ESC turns L_FN off only if it was locked on

* Add missing record->event.pressed checks

* Move numpad toggling logic into function

* Disable Bootmagic, enable KEYBOARD_SHARED_EP with Command

users/konstantin/config.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#define FORCE_NKRO
+
+#define MAGIC_KEY_LAYER0_ALT1 BSLS
+#define MAGIC_KEY_BOOTLOADER  ESC
+
+#define MOUSEKEY_DELAY             50
+#define MOUSEKEY_INTERVAL          15
+#define MOUSEKEY_MAX_SPEED         4
+#define MOUSEKEY_TIME_TO_MAX       50
+#define MOUSEKEY_WHEEL_MAX_SPEED   1
+#define MOUSEKEY_WHEEL_TIME_TO_MAX 50
+
+#define NO_ACTION_FUNCTION
+#define NO_ACTION_MACRO
+
+#define PERMISSIVE_HOLD
+#define TAPPING_TERM    200
+#define TAPPING_TOGGLE  2
+
+#define UNICODE_CYCLE_PERSIST  false
+#define UNICODE_SELECTED_MODES UC_WINC, UC_WIN, UC_LNX
+#define UNICODE_WINC_KEY       KC_RGUI