Refactor helix/rev3_{4,5}rows (#25430)

* Refactor helix/rev3_{4,5}rows

rev3_4rows and rev3_5rows are identical, except for the extra row users
can snap off of their PCBs.

- Add alias for rev3_4rows
- Migrates legacy defines and configuration to keyboard.json
- Tidy's keymap and migrates to JSON
- Removes RGB Light configuration, enables RGB Matrix
- Removes DIP switch configuration, as they do not appear to be present
  on PCBs
- Adds an alternate 4 row layout for snappable PCB
- Tidy's up OLED code
- Enables standard features (bootmagic, extrakey, etc.)

* Alias for rev3_5rows -> rev3

* Add product URL

* Replace mistakenly removed DIP switch configuration

* Remove rebase artifact

data/mappings/keyboard_aliases.hjson

@@ -2311,6 +2311,12 @@
     "handwired/dygma/raise": {
         "target": "handwired/dygma/raise/ansi"
     },
+    "helix/rev3_4rows": {
+        "target": "helix/rev3"
+    },
+    "helix/rev3_5rows": {
+        "target": "helix/rev3"
+    },
     "ibm/model_m/mschwingen": {
         "target": "ibm/model_m/mschwingen/led_wired"
     },