docs(docs): replace Commonwealth with Settled Reach across docs

Updated in-universe "Commonwealth" references to "the Settled Reach"
in decisions, architecture docs, design docs, workshop outputs,
README, and wiki. Kept all references to Hamilton's books as
inspiration/comparison in historical discussions and wiki-review
workshop rounds.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/workshops/generator-architecture/ozzie-round1.md

@@ -65,7 +65,7 @@ This is the real question.
 For the 50th station to be exciting, the generator can't just be varying surface features. It has to be varying WHAT MATTERS.
 
 What matters to me as a player:
-- **Who has power here** — and how it shows in the space. A station under Intersolar Commonwealth control looks and moves differently than one under de Terre influence. That's not just art. That's which doors are locked, which NPCs are nervous, where the cameras point.
+- **Who has power here** — and how it shows in the space. A station under Concord control looks and moves differently than one under de Terre influence. That's not just art. That's which doors are locked, which NPCs are nervous, where the cameras point.
 - **What happened here** — the environmental story. A district that used to be prosperous and isn't anymore. A market that's clearly improvised after something was destroyed. Spaces tell history. The generator needs inputs that make history legible.
 - **What's the social architecture** — where do the hierarchies show up physically? Where do the powerful people eat lunch? Where do the workers hide from supervisors? This makes stations feel like societies, not buildings.