[Keymap] Update/refactor userspace and add keymaps for rmeli (#18398)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Elliot Powell <johnp8727@gmail.com>

users/rmeli/config.h

@@ -0,0 +1,44 @@
+/*
+Copyright 2021-2022 Rocco Meli <@RMeli>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#define TAPPING_TERM 200
+
+#ifdef UNICODEMAP_ENABLE
+#    define UNICODE_SELECTED_MODES UC_MAC, UC_LNX
+#endif
+
+#ifdef AUTO_SHIFT_ENABLED
+#    define AUTO_SHIFT_REPEAT
+#endif
+
+#ifdef HOME_ROW_MODS_ENABLED
+#    define IGNORE_MOD_TAP_INTERRUPT
+#endif
+
+#ifdef CAPS_WORD_ENABLE
+#    define BOTH_SHIFTS_TURNS_ON_CAPS_WORD
+//#define DOUBLE_TAP_SHIFT_TURNS_ON_CAPS_WORD
+#endif
+
+#ifdef RGBLIGHT_ENABLE
+#    define RGBLIGHT_LIMIT_VAL 120
+#    define RGBLIGHT_HUE_STEP 10
+#    define RGBLIGHT_SAT_STEP 17
+#    define RGBLIGHT_VAL_STEP 17
+#endif