* add split space and ISO
* Update wkl.h
* update ISO
* update
* change KC_LGUI to KC_RGUI
* delete RGUI
* format
* update promise87 readme.md
* update promise87 wkl readme.md
* Update readme.md
* Update readme.md
* change KC_SLCK to KC_SCRL
* wuque/promise87/ansi: standardize Layout Macro names
- rename `LAYOUT_tkl_f13_ansi` to `LAYOUT_tkl_f13_ansi_tsangan`
- convert `LAYOUT_tkl_f13_ansi_iso` to `LAYOUT_tkl_f13_iso_tsangan` (adds position `K41`)
- rename `LAYOUT_tkl_f13_ansi_split_space` to `LAYOUT_tkl_f13_ansi_tsangan_split_space`
- rename `LAYOUT_tkl_f13_ansi_split_bs` to `LAYOUT_tkl_f13_ansi_tsangan_split_bs`
- rename `LAYOUT_tkl_f13_ansi_split_lshift` to `LAYOUT_tkl_f13_ansi_tsangan_split_lshift`
- rename `LAYOUT_tkl_f13_ansi_split_rshift` to `LAYOUT_tkl_f13_ansi_tsangan_split_rshift`
- rename `LAYOUT_tkl_f13_ansi_split_bs_rshift` to `LAYOUT_tkl_f13_ansi_tsangan_split_bs_rshift`
* wuque/promise87/wkl: refactor LAYOUT_tkl_f13_ansi_wkl_iso
Refactors `LAYOUT_tkl_f13_ansi_wkl_iso` into `LAYOUT_tkl_f13_iso_wkl` by adding position `K41` (Non-US Backslash) to the layout macro.
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
