[Core] Convert Dynamic Macro to a Core Feature (#5948)

* Convert Dynamic Macro to a Core Feature

This imports the code from Dynamic Macro into the core code, and handles it, as such.

This deprecates the old method but does not remove it, for legacy support. This way, no existing user files need to be touched.

Additionally, this reorganizes the documentation to better reflect the changes.

Also, it adds user hooks to the feature so users can customize the existing functionality.

Based heavily on and closes #2976

* Apply suggestions from code review

Co-Authored-By: fauxpark <fauxpark@gmail.com>
Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

* Cleanup based on feedback

* Add short-form keycodes and document them

- add short-form keycodes to quantum/quantum_keycodes.h
- document the new aliases in docs/feature_dynamic_macros.md

* Add Dynamic Macros section and keycodes to docs/keycodes.md

* Make anti-nesting optional

* Add documentation for DYNAMIC_MACRO_NO_NESTING option

* Fix Merge artifacts

* Fix formatting typo in docs

Co-Authored-By: James Young <18669334+noroadsleft@users.noreply.github.com>

* Remove DYNAMIC_MACRO_RANGE as it's not needed

* Fix includes and layer var type

1 files changed, 15 insertions, 1 deletions

diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 5fac6a5ca..51a7e290f 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -505,6 +505,13 @@ enum quantum_keycodes {
     MAGIC_EE_HANDS_LEFT,
     MAGIC_EE_HANDS_RIGHT,
 
+    // Dynamic Macros
+    DYN_REC_START1,
+    DYN_REC_START2,
+    DYN_REC_STOP,
+    DYN_MACRO_PLAY1,
+    DYN_MACRO_PLAY2,
+
     // always leave at the end
     SAFE_RANGE
 };
@@ -757,4 +764,11 @@ enum quantum_keycodes {
 #    define SH_OFF (QK_SWAP_HANDS | OP_SH_OFF)
 #endif
 
-#endif  // QUANTUM_KEYCODES_H
+// Dynamic Macros aliases
+#define DM_REC1 DYN_REC_START1
+#define DM_REC2 DYN_REC_START2
+#define DM_RSTP DYN_REC_STOP
+#define DM_PLY1 DYN_MACRO_PLAY1
+#define DM_PLY2 DYN_MACRO_PLAY2
+
+#endif // QUANTUM_KEYCODES_H