Seed signer+smart card hat stuff from XMRStreet (#330)

* Create README.md

* Create production files

* Delete SeedSigner+ Smartcard combo hat/production files

* Add files from XMRStreet

Plus initial kicad import

* Update .gitignore

* Remove WIP Kicad version for now

* Add electronics README with project descriptions and display hat link (#347)

* Initial plan

* Add electronics/README.md with project descriptions and link to SeedSignerPlus display hat

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Co-authored-by: 3rdIteration <2230318+3rdIteration@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: 3rdIteration <2230318+3rdIteration@users.noreply.github.com>

* Remove placeholder folder-name/ directory with empty README.md

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Co-authored-by: 3rdIteration <2230318+3rdIteration@users.noreply.github.com>

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Co-authored-by: xmrstreetstore <info@xmrstreet.store>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: 3rdIteration <2230318+3rdIteration@users.noreply.github.com>

Author: 3 people

.gitignore

@@ -1,15 +1,15 @@
-.DS_Store
-__pycache__/
-src/seedsigner.egg-info/
-.nova
-.vscode
-src/seedsigner/models/settings_definition.json
-.idea
-.coverage*
-
-*.po
-*.mo
-jcardsim.jar
-settings.json
-/microsd
-build/
+.DS_Store
+__pycache__/
+src/seedsigner.egg-info/
+.nova
+.vscode
+src/seedsigner/models/settings_definition.json
+.idea
+.coverage*
+
+*.po
+*.mo
+jcardsim.jar
+settings.json
+/microsd
+build/

electronics/README.md

@@ -0,0 +1,17 @@
+# Electronics
+
+This folder contains hardware design files for SeedSigner electronics projects. Source files are provided in a range of formats including KiCad, Circuitmaker, and EasyEDA.
+
+## SEC1210 Smartcard Hat
+
+The [`SmartcardHat/`](SmartcardHat/) folder contains the design files for a CCID/PCSC compatible Smart Card interface hat that connects over UART through a standard Raspberry Pi GPIO header (using the SEC1210-URT or SEC1210-UR2 serial interface). It also provides a USB-C socket for powering the device. Available in full-sized card, SIM-sized card, and dual-slot variants. See the [SmartcardHat readme](SmartcardHat/readme.md) for full details.
+
+## SeedSignerPlus Display Hat
+
+The SeedSignerPlus display hat design files are maintained in a separate repository:
+
+👉 [**seedsigner-hardware — SeedSignerPlus Display Hat**](https://github.com/3rdIteration/seedsigner-hardware/tree/main/display_hats/plus_hat)
+
+## SeedSignerPlus + Smartcard Combo Hat
+
+The [`SeedSigner+ Smartcard combo hat/`](SeedSigner+%20Smartcard%20combo%20hat/) folder contains the design files for a hat that integrates the SeedSignerPlus display hat and the Smartcard hat functionality into a single board.