Add Voron 2 BTT Octopus V1.1 in SPI mode; This PR will not work properly without PR #247

[GadgetAngel]

*Add Voron 2 BTT Octopus V1.1 in SPI mode, This PR will not work properly without PR#247. It contains a link to the information in PR #247

*In Community/Electronics/ added the following:

1. GadgetAngel folder
2. images subfolder

*updated Index.md file in Community/Electronics/ to add "Voron V2 - BTT Octopus V1.0/V1.1 Wiring for both SPI and UART modes" (v2_octopus_wiring.md) *v2_octopus_wiring.md is a parent to v2_octopus11_spi_wiring.md

*reused three additional files: a. Octopus11_ProbePort.md b. Octopus11_RaspberryPi.md c. Octopus11_Resources.md

*added initial Removal of Jumpers diagram *added initial preparation - Set Jumpers diagram for BTT Octopus V1.1 in SPI mode *updated description for Voron 2.4 wiring diagram in BTT Octopus V1.1 in SPI mode *added the heatsink diagram to remind user to ensure that the heatsinks are installed on the stepper motor drivers for: *Added the following MCU with heat sinks in SPI mode *added URL to the Klipper Configuration from VoronDesign/Voron-2 GitHub Repo for BTT Octopus V1.1 *informed user that the above config file needs to be changed from UART to SPI *added links to other resources