Using SPI3_HOST instead of VSPI_HOST (#72)

For better compatibility with other ESP32s (like S3)

Expose more Mifare util functions (#70)

Optional task mutex (#69)

Protection of Sector Trailer by verifying access bits integrity befor…

…e write (#66)

Remove block's buffer_size arg from mifare read/write functions (#64)

Since it's always 16 bytes

README updated with Component Manager info (#63)

Introduced custom type for crc result (#61)

Example that uses multiple readers (#58)

- Added example that uses 2 readers
- Use term 'reader' in other examples as well

Fixed reading blocks when sector has more than 4 blocks (#52)

- Separate functions for reading trailer and regular blocks
- Function for reading regular blocks depends on trailer block
- Added unit tests for most of mifare functions

Version 3 (#49)

- Returns card type (mifare 1k, 4k, ...) based on SAK
- Functions for reading/writing from/to memory on MIFARE Classic cards
- Sector Trailer block protection (write prevented by default,
configurable via menuconfig)
- Hard reset via RST pin (optional, auto switch to soft if hard fails)
- Firing events when picc changes state (all states described in 14443
iso are supported)
- Added examples
  - Basic for getting UID and type of the card
  - Dump whole card memory content
  - Reading and writing from/to card memory
- Unit tests
- CI
  - Run unit tests
  - Build examples 
- Returns UID length, and UID is now in the form of a byte array
  - resolves #41
  - resolves #23
- Rewritten read_write test. Using PCD fifo buffer now to test if the
library can read/write multiple bytes
  - resolves #37 (hopefully)
- Firing event when card disappears from the scanner field
- Additional affected issues:
  - closes #40
- closes #25 because library is fully rewritten, and this should be
tried again (feel free to reopen the issue if you are facing the same
issue in the new version)