Migrate to st-flexipatch with sixel support

Switch from manually patched st to st-flexipatch (bakkeby/st-flexipatch).
This uses preprocessor directives in patches.h to toggle patches at
compile time, making it much easier to add/remove features.

Enabled patches:
- alpha (transparency)
- anygeometry, anysize (dynamic borders)
- blinking_cursor
- boxdraw (box-drawing chars)
- clipboard
- columns (no text cut on resize)
- copyurl
- externalpipe
- font2 (fallback fonts)
- iso14755 (unicode input)
- ligatures (HarfBuzz)
- newterm (spawn in cwd)
- scrollback + scrollback_mouse
- sixel (NEW - for manga-tui image support)
- swapmouse
- sync
- xresources + xresources_reload

To toggle patches: edit patches.h and rebuild.
See README.md for documentation on the preprocessor system.

Merge pull request #64 from rdbo/window-close-fix

Fixes window not closing (#63)

fixed window not closing on wayland

misc | fix scrolling not working in nvim

add netwmicon patch | bump to v0.8.5

re-add many patches , bump to 0.8.4 | This isnt based on luke smiths build :D

[PATCH] Patch for persistence of content across resize

add patch_column patch

rm patch_column

test patch_column patch

default st

st-history patch added

Merge pull request #12 from TripleK2004/main

patched the second patch of appsync : )

patched appsync

newterm patch

bubu