[Keymap] add "ridingqwerty" user and keymap for atreus keyboard (#6533)

* add userspace and atreus keymap

* cleaning up notes/comments

* Update keyboards/atreus/keymaps/ridingqwerty/atreus.c

Co-Authored-By: Joel Challis <git@zvecr.com>

* Update keyboards/atreus/keymaps/ridingqwerty/atreus.c

Co-Authored-By: Joel Challis <git@zvecr.com>

* Create readme.md

* remove reference to matrix_init_kb from atreus.c

* correct atreus.c

* remove unnecessary defines

* merge register/unregister sequence into single tapcode

* move 'LAYOUT to keymap.c; remove atreus.h

* remove TAPPING_TERM from keyboard-level config.h

1 files changed, 29 insertions, 0 deletions

diff --git a/users/ridingqwerty/process_records.h b/users/ridingqwerty/process_records.h
new file mode 100644
index 0000000000..2c453bcd93
--- /dev/null
+++ b/users/ridingqwerty/process_records.h
@@ -0,0 +1,29 @@
+#pragma once
+#include "ridingqwerty.h"
+
+#if defined(KEYMAP_SAFE_RANGE)
+  #define PLACEHOLDER_SAFE_RANGE KEYMAP_SAFE_RANGE
+#else
+  #define PLACEHOLDER_SAFE_RANGE SAFE_RANGE
+#endif
+
+bool process_record_secrets(uint16_t keycode, keyrecord_t *record);
+bool process_record_keymap(uint16_t keycode, keyrecord_t *record);
+
+enum userspace_custom_keycodes {
+    FIRST = PLACEHOLDER_SAFE_RANGE,
+    RUSTY,
+    FUEL,
+    C0RE,
+    MUNKY,
+    AR1ST,
+    VAXIS,
+    OS_LAB,
+    CDLOCAL,
+    SYSNOC,
+    RG_QUOT,
+    LAST
+};
+
+bool process_record_secrets(uint16_t keycode, keyrecord_t *record);
+bool process_record_keymap(uint16_t keycode, keyrecord_t *record);