docs: rewrite readme (#2482) #3300

Job	Run time
test-snp	1m 49s
lint	1m 17s
test (rpc)	1m 49s
test (bns-e2e)	7m 11s
test (api)	11m 19s
test (event-replay)	2m 12s
test (bns)	3m 16s
test-2_5 (faucet-stx)	1m 31s
test-2_5 (pox-4-delegate-aggregation)	2m 6s
test-2_5 (pox-4-btc-address-formats)	2m 23s
test-2_5 (pox-4-burnchain-delegate-stx)	2m 2s
test-2_5 (pox-4-delegate-stacking)	2m 4s
test-2_5 (pox-4-burnchain-stack-stx)	1m 43s
test (btc-faucet)	1m 40s
test-2_5 (block-zero-handling)	1m 31s
test-2_5 (pox-4-delegate-revoked-stacking)	1m 58s
test-2_5 (pox-4-stack-extend-increase)	2m 33s
semantic-release	42s
build-publish	0s
	49m 6s

Provide feedback