Add Voron 2.4 BTT Octopus Pro in SPI mode; This PR will not work properly without PR #251

[GadgetAngel]

*Add Voron 2 BTT Octopus Pro in SPI mode, This PR will not work properly without PR #251 . It contains a link to the information in PR #251

*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 Pro V1.0 Wiring for both SPI and UART modes" (v2_octopus_pro_wiring.md) *v2_octopus_pro_wiring.md is a parent to v2_octopus_pro_spi_wiring.md

*reused three additional files: a. OctopusPro_ProbePort.md b. OctopusPro_RaspberryPi.md c. OctopusPro_Resources.md

*added initial Removal of Jumpers diagram *added initial preparation - Set Jumpers diagram for BTT Octopus Pro in SPI mode *added description for Voron 2.4 wiring diagram in BTT Octopus Pro 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 Pro *informed user that the above config file needs to be changed from UART to SPI *added links to other resources