Add ADXL345 accelerometer config and doc (#6)

artillery-sidewinder-x2/klipper-cfg-files/adxl345.cfg

@@ -0,0 +1,23 @@
+[mcu no_name_adxl]
+# Change <mySerial> to whatever you found above. For example,
+# usb-Klipper_rp2040_E661640843545B2E-if00
+serial: /dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.1:1.0
+
+
+
+[adxl345]
+cs_pin: no_name_adxl:gpio9
+spi_software_sclk_pin: no_name_adxl:gpio10
+spi_software_mosi_pin: no_name_adxl:gpio11
+spi_software_miso_pin: no_name_adxl:gpio12
+
+axes_map: x,z,y
+
+[resonance_tester]
+accel_chip: adxl345
+probe_points:
+    # Somewhere slightly above the middle of your print bed
+    100,100, 20
+
+#[output_pin power_mode] # Improve power stability
+#pin: adxl:gpio23

artillery-sidewinder-x2/klipper-cfg-files/printer.cfg

@@ -10,6 +10,8 @@
 # See more description here: https://blog.freakydu.de/posts/2022-10-01-klipper_with_artillery_sidewinderx2/
 # See docs/Config_Reference.md for a description of parameters.
 
+[include adxl345.cfg]
+
 [include macros.cfg]
 
 [mcu]
@@ -183,6 +185,9 @@ runout_gcode: M117 Filament runout # Optional
 insert_gcode: M117 Filament insert # Optional
 switch_pin: PA0 # the z-endstop pin
 
+# Support for M117 gcode (message display)
+[display_status]
+
 # Support for gcode arc (G2/G3) commands.
 [gcode_arcs]
 #resolution: 1.0