fix(packages): rename syncthingtray-qt6, ship neofetch from localrepo

CI package check failed on main (400/402):

- syncthingtray-qt6 no longer exists in the AUR (RPC returns nothing);
  the qt6 build is now the official 'syncthingtray' package in extra/
  cachyos - rename it in packages.x86_64 and drop the dead
  AUR_MISSING entry from build-end4-deps.sh
- neofetch left the distro repos (only chaotic-neofetch-git remains);
  build the AUR package locally (7.1.0-2, PGP-verified against Dylan
  Araps' key) and commit it to localrepo/ with a reindexed local-aur
  db so both the CI check (file glob) and pacstrap ([local-aur]) work
- un-indent the package lists in build-end4-deps.sh: CI accepts
  repo-less packages via 'grep -qxF <name>' (exact whole-line match),
  which could never match indented names

Verified locally with an exact replica of the CI check: 402/402.

localrepo/build-end4-deps.sh

@@ -87,34 +87,36 @@ done
 info "═══ Step 2: Building AUR dependencies ═══"
 
 # ── Theming & appearance ─────────────────────────────────────────────────────
+# Entries in these lists must start at column 0: CI's package check accepts
+# repo-less packages via `grep -qxF <pkg>` against this file (exact whole-line
+# match), which silently never matched while the names were indented.
 AUR_THEMING=(
-  adw-gtk-theme-git
-  darkly-bin
-  ttf-material-symbols-variable-git
-  ttf-readex-pro
-  ttf-rubik-vf
-  ttf-twemoji
-  otf-space-grotesk
-  kde-material-you-colors-git
+adw-gtk-theme-git
+darkly-bin
+ttf-material-symbols-variable-git
+ttf-readex-pro
+ttf-rubik-vf
+ttf-twemoji
+otf-space-grotesk
+kde-material-you-colors-git
 )
 
 # ── end-4 specific / build-from-source packages ──────────────────────────────
 # matugen — material you color generation tool
 # speech-dispatcher — may need AUR build on some setups
 AUR_TOOLS=(
-  matugen
-  python-rpypostprocess
-  tts
+matugen
+python-rpypostprocess
+tts
 )
 
 # ── Packages not in any standard repo ────────────────────────────────────────
 AUR_MISSING=(
-  asciinema-agg
-  davs2
-  syncthingtray-qt6
-  varia
-  woeusb-ng
-  ttf-ms-fonts
+asciinema-agg
+davs2
+varia
+woeusb-ng
+ttf-ms-fonts
 )
 
 # ── Large / complex builds (skipped with --quick) ────────────────────────────