Mode M75S Layout Additions, Configurator Data and Code Touch-Up (#16327)

* m75s.h: correct matrix position identifier

`K5C` is actually on row 4, so it should be `K4C`.

* m75s.h: add matrix diagram

* add QMK Configurator data

* polish whitespace

- convert tabs to spaces
- update indent to four spaces
- remove trailing whitespace

* update readme

Didn't seem to be fully updated after being copied from the M65S codebase.

* add LAYOUT_ansi with keymap

ANSI layout with 2u Backspace.

* add LAYOUT_iso with keymap

ISO layout with 2u Backspace.

* add LAYOUT_ansi_tsangan with keymap

ANSI layout with 2u Backspace and 7u Spacebar.

* add LAYOUT_iso_tsangan with keymap

ISO layout with 2u Backspace and 7u Spacebar.

* add LAYOUT_ansi_split_bs with keymap

ANSI layout with Split Backspace.

* add LAYOUT_iso_split_bs with keymap

ISO layout with Split Backspace.

* add LAYOUT_ansi_tsangan_split_bs with keymap

ANSI layout with Split Backspace and 7u Spacebar.

* add LAYOUT_iso_tsangan_split_bs with keymap

ISO layout with Split Backspace and 7u Spacebar.

1 files changed, 4 insertions, 6 deletions

diff --git a/keyboards/mode/m75s/readme.md b/keyboards/mode/m75s/readme.md
index a663847278..8ff9fb03b4 100644
--- a/keyboards/mode/m75s/readme.md
+++ b/keyboards/mode/m75s/readme.md
@@ -1,8 +1,6 @@
-# Mode SixtyFive M65S
+# Mode SeventyFive M75S
 
-![MODE75](https://raw.githubusercontent.com/Gondolindrim/file_hosting/main/mode_sixtyfive/Group_95_1024x1024.jpg)
-
-The M65S is the solderable PCB for the Mode SixtyFive keyboard, a sixty-five-percent high-end keyboard sold by [Mode Designs](https://shop.modedesigns.com/).
+The M75S is the solderable PCB for the Mode SeventyFive keyboard, a seventy-five-percent high-end keyboard sold by [Mode Designs](https://shop.modedesigns.com/).
 
 -   Keyboard Maintainer: [Gondolindrim](https://github.com/Gondolindrim)
 -   Hardware Supported: proprietary PCB using STM32F401 controller
@@ -10,10 +8,10 @@ The M65S is the solderable PCB for the Mode SixtyFive keyboard, a sixty-five-per
 
 Make example for this keyboard (after setting up your build environment):
 
-    make mode/m65s:default
+    make mode/m75s:default
 
 Flashing example for this keyboard:
 
-    make mode/m65s:default:flash
+    make mode/m75s:default:flash
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).