Initial import of my Klipper macros, modules and scripts

Macros as they run on the printer (Voron 2.4 + AFC Box Turtle +
Blobifier + Beacon + bd_pressure + bdwidth + iHeater), the Klipper
modules they need (xy_drift, bdwidth_status, bdpressure_check), MCU
firmware update scripts, install.sh with Moonraker update manager
support, and READMEs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,3 @@
+# Everything runs on Linux (Klipper host): keep LF line endings,
+# also when the repo is edited on Windows.
+* text=auto eol=lf