Track binary driver/installer payloads via Git LFS

Reverses the earlier '.gitignore + filter-repo' approach: 849 binary
files (.cab .sys .dll .inf .cat .exe .msi .msp .mst .jar .icm .chm
.jsa .prn .dl_ .da_ .ch_ .in_ .ex_ .ds_, case-insensitive) now flow
through LFS (.gitattributes), while the repo tree stays small.

Rationale: fresh clones should be buildable without out-of-band driver
fetches. LFS keeps the blobs on Gitea's LFS storage; the repo ships
pointer files (~140 bytes each).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,27 +1,7 @@
-*.exe
-*.zip
-*.msi
-*.msp
-*.mst
-*.cab
-*.sys
-*.dll
-*.inf
-*.cat
-*.dl_
-*.da_
-*.ch_
-*.in_
-*.ex_
-*.ds_
-*.EXE
-*.ZIP
-*.MSI
-*.CAB
-*.SYS
-*.DLL
-*.INF
-*.CAT
+# Binaries tracked via Git LFS (see .gitattributes)
+# Keep these ignored only if you don't want LFS pointers:
+# *.exe *.cab *.dll *.sys *.inf *.cat etc.
+
 Thumbs.db
 Output/
 .claude/