VM/EVM: Update and align README Documentation (#2016)

* EVM: adopt README links

* VM/EVM -> README : added distinkt introductory texts for the libraries

* EVM: update README code example

* VM -> README: added more fitting (and working) VM example

* VM/EVM: example updates/fixes and moving around

* VM/EVM -> README: added new sections on EVM/VM relationship

* VM/EVM -> README: added EEI and State sections to EVM and VM READMEs

* EVM/VM -> README: unify, adopt and deduplicate Chain Type, Hardfork, Genesis State and EIP sections

* EVM/VM -> README: adopt event sections

* EVM/VM -> README: adopt debug logger and internal structure sections

* EVM/VM -> README: deduplicate Development docs