docs(docs): Update and complete basic ARC42 Architecture specifications. (#3611)
* fix(general): remove unused Athena project directory (Athena is inside Hermes) * fix(docs): make bullets indent by 4 to be compatible with standard markdown requirements * docs(docs): Add into and goals to arc42 docs * docs(docs): Update arc42 index * docs(docs): add arc42 architecture constraints * fix(docs): Cose Sign * docs(docs): arc42 system scope * docs(docs): Solution Strategy * docs(docs): add arc42 building block view * fix(docs): arc42 runtime view * docs(docs): arc42 deployment view * docs(docs): arc42 technical_risks * docs(docs): arc42 glossary * fix(docs): consistency updates * docs(docs): Add ADRs and cleanup format and spelling * docs(docs): fix markdown * fix(docs): ADR Cleanup