[Keymap] Move common code and configuration to userspace for dshields keymaps. (#6537)

users/dshields/dshields.h

@@ -0,0 +1,31 @@
+#pragma once
+
+// dynamic macro keys
+#define DM_PLAY DYN_MACRO_PLAY1
+#define DM_STRT DYN_REC_START1
+#define DM_STOP DYN_REC_STOP
+
+// one-shot layer keys
+#define OSL_RSE OSL(RSE)
+#define OSL_LWR OSL(LWR)
+#define OSL_FUN OSL(FUN)
+
+// one-shot modifier keys
+#define OSMLCTL OSM(MOD_LCTL)
+#define OSMRCTL OSM(MOD_RCTL)
+#define OSMLALT OSM(MOD_LALT)
+#define OSMRALT OSM(MOD_RALT)
+#define OSMLSFT OSM(MOD_LSFT)
+#define OSMRSFT OSM(MOD_RSFT)
+
+// mod-tap keys
+#define MT_SPC  SFT_T(KC_SPC)
+
+#ifdef KEYBOARD_planck_light
+    #define LGT_TOG RGB_TOG
+    #define LGT_MOD RGB_MOD
+#else
+    #define LGT_TOG BL_TOGG
+    #define LGT_MOD BL_STEP
+#endif
+