Flipper Zero addon board (#935)

* Create README.md

* Add files via upload

* Create src

* Delete projects/Business Card/src

* Create Abc

* Add files via upload

* Delete projects/Business Card/src/Abc

* Update README.md

* Rename Gerber.zip to gerber.zip

* Rename Schematic.pdf to schematic.pdf

* Update and rename SCHEMATIC.json to schematic.json

* Update and rename PCB.json to pcb.json

* Delete projects/Business Card/cart.png

* Add files via upload

* Update README.md

* Delete projects/Business Card/cart.png

* Delete projects/Business Card/gerber.zip

* Delete projects/Business Card/schematic.pdf

* Add files via upload

* Update README.md

* Delete projects/Business Card/src/pcb.json

* Delete projects/Business Card/src/schematic.json

* Create abc

* Add files via upload

* Delete projects/Business Card/cart.png

* Delete projects/Business Card/gerber.zip

* Delete projects/Business Card/schematic.pdf

* Delete projects/Business Card/src directory

* Add files via upload

* Delete projects/Business Card/pcb.json

* Add files via upload

* Create abc

* Add files via upload

* Delete projects/Business Card/src/abc

* Rename README.md to README.md

* Update README.md

* Add files via upload

* Create abc

* Add files via upload

* Delete projects/Flipper Zero GPIO/src/abc

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Co-authored-by: blaze <Arnnav0kudale@gmail.com>

projects/Flipper Zero GPIO/README.md

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+---
+name: "Knut-Herbert"
+slack_handle: "@KHM"
+github_handle: "@cryptopapi713"
+---
+
+Flipper Zero addon board 
+<!-- Describe your board in 2-3 sentences. What are you making? What will it do? -->
+
+This is a expansion board, for the multitool Flipper Zero. It adds functions like a 443mhz radio, a GPS and a ESP-32.
+
+<!-- How much is it going to cost? -->
+
+Around 65 dollars, I will order 5 of them along with PCBA.
+
+<!-- Tell us a little bit about your design process. What were some challenges? What helped? Totally optional -->
+
+I originally created a simple business card, because i did not know how to design more complicated stuff, but a friend helped me out. Shout out to Jason!