atlas_65 Layout Macro Refactor (#16483)

* atlas_65.h: add matrix diagram

* atlas_65.h: apply linting

- convert tabs to spaces
  - four-space indent
- align backslashes in layout macro

* atlas_65.h: adjust layout macro alignment

Visually separates each side. White-space-only change.

* physically arrange layout macro

Move the matrix position identifiers in the layout macro to resemble the assembled keyboard's layout.

- move `k46` (right side B) to the fourth (Shift) row
- move each of `k1E`, `k2E` and `k3E` (right side navigation keys) up one row
- update keymaps to match

* update maintainer data

Update the maintainer data in `info.json` and `readme.md`.

keyboards/atlas_65/info.json

@@ -1,7 +1,7 @@
 {
     "keyboard_name": "atlas-65",
     "url": "https://github.com/ryanstevensmith/atlas-65",
-    "maintainer": "Joshua Nguyen",
+    "maintainer": "ryanstevensmith, Joshua Nguyen",
     "layouts": {
         "LAYOUT": {
             "layout": [