macros: parameterize CC1/CC2 motion geometry, restore stock cut behavior

[pdscomp]

PR to make macros.cfg stock-faithful on both machines and parameterize the per-machine geometry instead of hardcoding CC1 values.

1. Add [gcode_macro _MACHINE_VARS] to each machine.cfg holding tray/wipe/kick coordinates; every lookup in macros.cfg defaults to the exact CC1 constant, so CC1 behavior is byte-identical unless a machine overrides it
2. CC2 values come from the vendor DSP-board config (printer_dsp_new.cfg), not the old-rev printer.cfg: tray X52 (left side), wipe X80, cutter corner park (245,25), ram X254.5 F3000, seat Y2.5 F600
3. CC1 KICK now cuts at the stock location too: front-right corner, Y30 -> X255 -> Y3 F600 (Elegoo app change_filament.cpp). James's v-slot swipe variant (4025623) is retained commented-out in the file
4. KICK unified across machines: axis-separated X-then-Y park approach with slow final 14mm, optional corner seat, optional post-cut Z shake (vendor CC2 shake_gcode: Z+2 hop then 20x +-0.5mm, CC2-only via kick_shake_times)
5. Enable CC2 filament runout sensor on PB13 per vendor config; disable CC2 chamber temp sensor (vendor PH0/GPADC0, DSP mcu firmware lacks ADC support - shuts down on sampling), finding documented in comment
6. Fix PURGE on main: 'global' was used without being defined, would throw at runtime

Testing: jinja-rendered every macro with klipper's real delimiters across three profiles (no _MACHINE_VARS, CC1 values, CC2 values) - CC1 output byte-identical to pre-change except the intentional KICK cut-location change; CC2 renders match printer_dsp_new.cfg moves exactly. Built the CC2 eMMC swu, flashed to hardware via the stock->cosmos swupdate path, klippy loads clean with zero config errors, runout sensor live in moonraker.

[github-actions]

✅ Build Artifacts

Branch: paul/cc2-macro
Build: c538ef7 (merge into main)

Artifact	Size
CC2 Firmware	202.03 MB
CC1 Firmware	89.81 MB

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[github-actions]

✅ Build Artifacts

Branch: paul/cc2-macro
Build: 947a306 (merge into main)

Artifact	Size
centauri-carbon-2 Elegoo OTA	112.51 MB
centauri-carbon-1 Firmware	89.89 MB
centauri-carbon-2 Firmware	89.58 MB

View workflow run