Merge pull request #21 from AZidan/feat/namespaced-commands

Namespaced /archflow:<name> commands, retire argument style, flatten plugin layout, 2.0.2

Merge feat/roadmap-v2: /archflow groom + plugin v2.0.1

Merge pull request #20 from AZidan/feat/roadmap-v2

v2.0: release model + collaboration model (schema rewrite)