Capture this laptop's Omarchy customizations

Everything on top of a stock Omarchy 4.0.4-1 install, gathered so a second
machine can be brought to the same state: the ~/.config files that actually
differ from the shipped defaults, the three hand-built themes, the ten shell
plugins pinned to commits, the two custom scripts, two user units, and the
/etc drop-ins.

install.sh applies it all idempotently, backing up anything it overwrites.
capture.sh runs the other way so the repo stays the source of truth rather
than a snapshot that rots.

indie.herdr-hud's ten local-only commits ship as a git bundle plus a
working-tree patch, since they stay off the upstream PR deliberately.

Secrets, the dotfiles repo's territory (shell/git/mise), the remote-access
stack and aether-managed themes are all scoped out; README says why for each.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

themes/simpsons/CREDITS.md

@@ -0,0 +1,14 @@
+# The Simpsons theme — real wallpapers pulled from the internet (wallhaven.cc),
+# palette derived from them.
+
+Backgrounds:
+1-springfield-wasteland.jpg  Homer & Bart, desert/RV scene (wallhaven 43pr6n,
+                             source: thomasjakeross.deviantart.com, SFW)
+2-bart-sunset.jpg            Bart mid-air skateboard trick, purple-pink sunset
+                             sky over Springfield (wallhaven 4vm36m)
+3-duff-wall.jpg              Homer surrounded by a wall of Duff, donuts and
+                             Krusty burgers (wallhaven o4d1m4)
+
+All images fetched via the wallhaven.cc public API, SFW-rated, kept at native
+resolution (1920x1200 / 1920x1080). Preview is the wasteland shot plus a
+palette swatch strip.