[SPI] Add support for multiple SPI buses

[tonhuisman]

Resolves #4968
Resolves #5273

Features:

• [SPI] Add support for multiple SPI buses, on supported ESP32 units: ESP32 Classic, ESP32-S2, ESP32-S3 and ESP32-P4 (once available)
• SD-Card configurable SPI Bus
• [P095] ILI9xxx TFT displays configurable SPI Bus
• [P104] MAX7219 matrix displays configurable SPI Bus
• [P116] ST77xx TFT displays configurable SPI Bus
• [P141] PCD8544 Nokia 5110 LCD displays configurable SPI Bus
• [P172] BMP3xx (SPI) configurable SPI Bus

This enables support for the secondary SPI bus on chips that have support for that, ESP32 Classic, S-series and P-series, No software multiplexing like we implemented for multiple I2C buses 😉. The current max. available is 2 SPI buses, even though there are up to 5 SPI buses integrated (ESP32-P4), the other buses are used for Flash and PSRAM, so not available for other uses, or are LP_SPI (low-power), that requires the use of specific LP enabled GPIO pins to be configured (ESP32-P4).

TODO: Plugins to enable configurable SPI Bus: (most need more extensive changes to the plugin code and/or libraries)

• [P039] Thermosensors
• [P096] ePaper displays
• [P099] XPT2046 touchscreen
• [P111] RC522 RFID reader
• [P118] Itho ventilation
• [P125] ADXL345 (SPI)
• [P162] MCP42xxx Digipot
• Ethernet configuration (with setting per Network Plugin)

TODO Generic:

• Testing ✅, testing ✅ and testing 😛 Help is welcome!
• Update documentation