Wilba Tech WT60-D Layout Addition and Touch-Up (#20859)

* add matrix_diagram.md

* info.json: apply friendly formatting

* add LAYOUT_60_iso_tsangan_split_bs_rshift

* update readme.md

- update maintainer/hardware section to a list
- update listed maintainer (Wilba6582 -> Wilba)

keyboards/wilba_tech/wt60_d/matrix_diagram.md

@@ -0,0 +1,24 @@
+# Matrix Diagram for wilba.tech WT60-D
+
+```
+                                                    ┌───────┐
+                                       2u Backspace │0D     │
+                                                    └───────┘
+┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
+│00 │03 │02 │01 │04 │05 │06 │07 │08 │09 │0C │0B │0A │0D │2D │
+├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┤      ┌─────┐
+│10   │11 │12 │13 │14 │15 │16 │17 │18 │19 │1A │1B │1C │1D   │      │     │
+├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤   ┌──┴┐1D  │
+│20    │21 │22 │23 │24 │25 │26 │27 │28 │29 │2A │2B │2C      │   │2C │    │
+├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────┬───┤   └───┴────┘
+│30  │31 │32 │33 │34 │35 │36 │37 │38 │39 │3A │3B │3C    │3D │    ISO Enter
+├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬┴───┤
+│40  │41  │42  │43                      │4A  │4B  │4C  │4D  │
+└────┴────┴────┴────────────────────────┴────┴────┴────┴────┘
+┌────────┐                                       ┌──────────┐
+│30      │ 2.25u LShift             2.75u RShift │3C        │
+└────────┘                                       └──────────┘
+┌─────┬───┬─────┬───────────────────────────┬─────┬───┬─────┐
+│40   │41 │42   │43                         │4B   │4C │4D   │ Tsangan/WKL/HHKB
+└─────┴───┴─────┴───────────────────────────┴─────┴───┴─────┘
+```

keyboards/wilba_tech/wt60_d/readme.md

@@ -6,9 +6,9 @@ WT60-D is a keyboard PCB supporting 60% layout. [More info at wilba.tech](https:
 
 First produced as WT60-D MEKANISK for Mekanisk.
 
-Keyboard Maintainer: [Wilba6582](https://github.com/Wilba6582)  
+* Keyboard Maintainer: [Wilba](https://github.com/Wilba)
-Hardware Supported: wilba.tech WT60-D  
+* Hardware Supported: wilba.tech WT60-D
-Hardware Availability: Custom keyboard group buys
+* Hardware Availability: Custom keyboard group buys
 
 Make example for this keyboard (after setting up your build environment):