feat: ✨ Add yeagboard (#1289)

* feat: ✨ Add yeagboard

Signed-off-by: Suyashtnt <[email protected]>

* fix: remove yeagboard cache file

---------

Signed-off-by: Suyashtnt <[email protected]>

projects/onboard-live-yeagboard/README.md

@@ -0,0 +1,59 @@
+---
+name: "Suyash Singh"
+slack_handle: "@A Badly Drawn Wobbler"
+github_handle: "@Suyashtnt"
+tutorial: # Link to the tutorial if you used one
+---
+
+# Yeagboard
+
+<!-- Describe your board in 2-3 sentences. What are you making? What will it do? -->
+## About
+
+A Split ergo keyboard based off the [Woagboard](https://github.com/Suyashtnt/woagboard)
+It's main differences are:
+
+- It uses a (Supermini NRF52840) rather rather than an onboard MCU (The Woagboard uses an Ebyte E73)
+  - This is a massive cost save at the downside of a taller and somewhat uglier design :(
+- A reversible PCB design
+- A dedicated power button
+- A shifted inner column and thumb keys
+  - I had some minor issues with the Woagboard's thumb keys, so I shifted them a bit to make it more comfy.
+
+<!-- How much is it going to cost? -->
+## Cost
+
+On JLCPCB it costs:
+
+- ~$8.60 for the PCB
+- ~$13.34 for shipping
+As I have a $10 coupon, it will cost me ~$11.94 to make the PCB.
+
+<!-- Tell us a little bit about your design process. What were some challenges? What helped? ***Totally optional*** -->
+## Design process
+
+This time it was an actually fairly painless process:
+
+- Steal some stuff from the Woagboard
+  - Switch matrix
+  - Button footprints
+- Steal some designs from [marbastlib](https://github.com/ebastler/marbastlib)
+  - I stole the hotswap footprints base from there
+  - I used it's Supermini NRF52840 footprint as well
+- Use ergogen to generate a basic layout for the keys
+- Go go gadget KLE-placer to place the keys in the right places based on the layout
+- Route the board
+- Realise I wanted it reversible
+  - Recreate button footprints and update hotswap footprints to make them reversible
+- Reroute the board like 3 times until happy
+- Stress for a day and double check every connection
+- ???
+- ~~Profit~~ Done!
+
+## Design Challenges
+
+The main challenge was routing around the Supermini NRF52840.
+The main issue is that the board has data pins on both sides, but the antenna is in the bottom middle,
+which means I can't route the data pins through the middle of the board as that would interfere with the antenna.
+So I had to try to route as much as possible through pin weaving and using the very edges of the board
+near the existing PTHs to route the data pins. The tolerances are scary.