Created Initial Powercore V3 User Manual

Copied over index.md and changed references from V2 to V3. Removed images from image folder. Awaiting documentation.

Author: Cooper-RackRobo

docs/powercore-v3.0/_index.md

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+# Powercore V3.0 User Manual [UNDER CONTRUCTION]
+
+## What is the Powercore V3.0? 
+### What is wire EDM? 
+### Safety
+**DANGER** The Powercore V3.0 operates at a potentially hazardous voltage of XXX - XXX VDC, and supplies high-power waveforms
+**POTENTIAL FOR DAMAGE**
+### Help
+
+If you find that there's something unclear in this documentation, please [submit a ticket on Github](https://github.com/Rack-Robotics/docs.git). 
+
+If you have questions, please join our [discord](https://discord.gg/z4XNk7Hkgw). 
+
+## Powercore V3.0 IO Ports
+
+ Port | Description |
+| --- | --- |
+
+![Powercore V3.0 Front Ports with Polarity Indicators]()
+
+
+## Best Practices
+
+- Avoid short circuits. A short circuit occurs when the POWER port outputs short together. This may happen if wiring is incorrect, or the cutting electrode collides with the work. A prolonged short circuit can damage the Powercore.
+
+- When integrating the Powercore V3.0 into a wire EDM build, ensure that the EN port fails to an off default state during machine shutoff.
+
+- Avoid disconnecting main power from the Powercore V3.0 while the device is enabled. 
+
+## Contributing 
+
+Want to chat? Please join our [discord](https://discord.gg/z4XNk7Hkgw).