docs: update README formatting

[faustbrian]

Reorganises a few bits, adds information about the root hash persistence and updates all information to be compatible with the 5.0.0 release. Should resolve https://github.com/ethereumjs/ethereumjs-monorepo/issues/2074

[codecov[bot]]

Codecov Report

Merging #2121 (5b2d024) into master (b102f67) will increase coverage by 0.03%. The diff coverage is n/a.

Flag	Coverage Δ
block	83.81% <ø> (ø)
blockchain	80.54% <ø> (ø)
client	77.06% <ø> (ø)
common	95.31% <ø> (ø)
devp2p	82.57% <ø> (+0.06%)	:arrow_up:
ethash	90.81% <ø> (ø)
evm	40.72% <ø> (ø)
rlp	90.47% <ø> (ø)
statemanager	84.55% <ø> (ø)
trie	81.49% <ø> (+0.47%)	:arrow_up:
tx	92.20% <ø> (ø)
util	87.22% <ø> (ø)
vm	78.05% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[faustbrian]

@holgerd77 updated all READMEs

[faustbrian]

@holgerd77 fixed

[holgerd77]

Ok, I'll be hitting "Squash and merge" here...

[holgerd77]

Seems to have worked: https://github.com/ethereumjs/ethereumjs-monorepo/commits/master 🙂

(the title should always be taken from the PR title, if that was the case? 🤔 So: in the case of this PR, it is)

[faustbrian]

Yeah GitHub should by default use the title of the PR as title for the squash.