Package, test and upload core

Update README.md: pre-requirements for macOS and fix flash loader instructions #309

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Build and package core	7m 38s
Test opta board	2m 44s
Test portentah7 board	2m 43s
Test giga board	2m 56s
Test portentac33 board	2m 48s
Test niclasense board	3m 40s
Test nano33ble board	2m 52s
Test frdm_mcxn947 board	2m 47s
Test frdm_rw612 board	1m 50s
Test ek_ra8d1 board	2m 45s
Collect logs	5s
Publish core	0s
Publish json	0s
	32m 48s