Enhanced documentation and final hardware corrections

Documentation Improvements:
- Added comprehensive 'Problems Addressed' section explaining the value proposition
- Covers power supply issues, CAN communication problems, safety concerns, and wiring challenges
- Removed JST-XH internal USB port references from pinout sections
- Corrected via placement specification (DC/DC PGND instead of output)

Hardware Updates:
- Updated schema files with latest component changes
- Added custom footprints for XR76203ELTR-F and heat sink components
- Refined manufacturing guidelines for optimal thermal performance

The documentation now clearly articulates the EWS board's role in solving common
Voron 3D printer control system challenges.

project.pretty/HeatSink_9x9x5.kicad_mod

@@ -0,0 +1,92 @@
+(footprint "HeatSink_9x9x5"
+	(version 20241229)
+	(generator "pcbnew")
+	(generator_version "9.0")
+	(layer "F.Cu")
+	(property "Reference" "REF**"
+		(at 0 -0.5 0)
+		(unlocked yes)
+		(layer "F.SilkS")
+		(hide yes)
+		(uuid "580ad602-7d9a-4b5f-8625-5ec97a8b779f")
+		(effects
+			(font
+				(size 1 1)
+				(thickness 0.1)
+			)
+		)
+	)
+	(property "Value" "HeatSink_9x9x5"
+		(at 0 1 0)
+		(unlocked yes)
+		(layer "F.Fab")
+		(hide yes)
+		(uuid "dd5edd79-c9a4-4ed2-a880-eb827c1b7258")
+		(effects
+			(font
+				(size 1 1)
+				(thickness 0.15)
+			)
+		)
+	)
+	(property "Datasheet" ""
+		(at 0 0 0)
+		(unlocked yes)
+		(layer "F.Fab")
+		(hide yes)
+		(uuid "9a04b339-c416-45bb-baca-485b4dc79590")
+		(effects
+			(font
+				(size 1 1)
+				(thickness 0.15)
+			)
+		)
+	)
+	(property "Description" ""
+		(at 0 0 0)
+		(unlocked yes)
+		(layer "F.Fab")
+		(hide yes)
+		(uuid "d2b70db2-9037-4ef8-bd91-e244a12bc3d6")
+		(effects
+			(font
+				(size 1 1)
+				(thickness 0.15)
+			)
+		)
+	)
+	(fp_rect
+		(start -4.6 -4.6)
+		(end 4.6 4.6)
+		(stroke
+			(width 0.1)
+			(type solid)
+		)
+		(fill yes)
+		(layer "F.Mask")
+		(uuid "52bdf289-035f-4ac1-8a5d-e4ca5482e099")
+	)
+	(fp_rect
+		(start -4.75 -4.75)
+		(end 4.8 4.8)
+		(stroke
+			(width 0.05)
+			(type default)
+		)
+		(fill no)
+		(layer "F.CrtYd")
+		(uuid "274daba3-a744-483c-a95f-622c7f8ab708")
+	)
+	(embedded_fonts no)
+	(model "${KIPRJMOD}/3d/9x9x5.step"
+		(offset
+			(xyz 0 0 0)
+		)
+		(scale
+			(xyz 1 1 1)
+		)
+		(rotate
+			(xyz -90 -0 -0)
+		)
+	)
+)