Add Voron 2 SKR V1.4/Turbo in SPI mode; This PR will not work properly without PR #263

[GadgetAngel]

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*Add Voron 2 SKR V1.4/Turbo in SPI mode, This PR will not work properly without PR #263 . It contains a link to the information in PR #263

*In Community/Electronics/ added the following:

GadgetAngel folder images subfolder

*updated Index.md file to add "Voron V2 - BTT SKR V1.4/Turbo Wiring for both SPI and UART modes" (v2_skr14_wiring.md) *v2_skr14_wiring.md is a parent to v2_skr14_spi_wiring.md.

*one additional file: a. skrv14init_prep_tmc_drvs_spi.md

*reused two additional files: a. skrv14_RaspberryPi.md b. skrv14_Resources.md

*added initial Removal of Jumpers diagram *added initial preparation - Set Jumpers diagram for SKR V1.4/Turbo in SPI mode *updated description for Voron 2 wiring diagram in SKR V1.4/Turbo 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:

1. MCU XYE with heat sinks in SPI mode 2.MCU Z with heat sinks in SPI mode

*added URL to the Klipper Configuration from VoronDesign/Voron-2 GitHub Repo for SKR V1.4/Turbo board *added links to other resources