cont. gridv2 cleanup

[abom]

Description

Remove all grid v2 explorer/deployment related source files and documentation.

Changes

• Remove:

  • [x] Explorer client
  • [x] Marketplace package
  • [x] zos/vdc reporting
  • [x] zos/vdc tests (including solutions automation)

• Update:

  • [x] Identity
  • [x] Stellar client
  • [x] Threebot entrypoint
  • [x] Admin and auth packages (including front-end) to remove all zos/pools/explorer related code
  • [x] API documentaion/Wiki (need more updates later)
  • [x] Tests (to remove all explorer related code) and to update references to removed packages/modules

Checklist

• [x] Pre-commit hook is installed to do formatting checks before committing code...etc
• [x] Tests included
• [x] Build pass
• [x] Documentation
• [x] Code format and docstrings