Fmt fixes
Spawn_after did not work with parameters
Examples working again
Revert "GHA update"
This reverts commit e0a71d4859966a6c5cf2629d3cb27e88acada9c0.
Readd flags
Only add DWT based dep with __v7 flag
Some beginners are confused about the "extern" section, so I added an
explanation comment to all examples. Furthermore, using the UARTx
interrupts when UART is actually being used in the same example may be
confusing, so I changed them all to SSI0/QEI0.