Fix pause/resume chain, shared print cleanup, add CLAUDE.md

- RESUME is defined only in print/pause_resume.cfg; heat_soak.cfg's
  duplicate replaced it (no unretract, no fan restore). It now runs
  HEAT_SOAK_RESUME -> _RESUME_PRINT -> RESUME_BASE.
- PAUSE runs PAUSE_BASE first, then retracts and parks once (X20 Y345);
  a parked flag makes resume undo only what PAUSE did.
- New _PRINT_CLEANUP shared by PRINT_END and CANCEL_PRINT: heaters incl.
  iHEATER_OFF, fan, M221 S100, bdwidth off, mesh and skew cleared.
  In PRINT_END it runs after RESTORE_GCODE_STATE so the flow reset sticks.
- Add CLAUDE.md and tools/effective_config.py.

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

macros/klipper-macros.cfg

@@ -5,9 +5,8 @@
 #
 #   [include klipper-macros/klipper-macros.cfg]
 #
-# Comment out what you do not use. Keep the order where noted: some
-# macros (PAUSE, RESUME, CANCEL_PRINT) are defined in more than one file
-# and the last definition wins.
+# Comment out what you do not use. Every macro is defined in exactly one
+# file: Klipper merges sections with the same name and the last one wins.
 #####################################################################
 
 [include save_variables.cfg]            # the one [save_variables] for all macros
@@ -16,7 +15,7 @@
 [include blobifier/blobifier.cfg]
 
 # Printing
-[include print/pause_resume.cfg]        # before heating/heat_soak.cfg
+[include print/pause_resume.cfg]
 [include print/filament.cfg]
 [include print/homing.cfg]
 [include print/idle_timeout.cfg]
@@ -25,7 +24,7 @@
 # Heating
 [include heating/bed_fans.cfg]
 [include heating/chamber_iheater.cfg]
-[include heating/heat_soak.cfg]          # its RESUME wraps the one above
+[include heating/heat_soak.cfg]
 [include heating/soak_my_bed.cfg]
 [include heating/filament_drying.cfg]