docs: generate + verify project documentation — canonical docs, per-package READMEs, verified fix pass

- New: docs/ARCHITECTURE.md, docs/GETTING-STARTED.md, docs/DEVELOPMENT.md,
  docs/TESTING.md, docs/CONFIGURATION.md (colored mermaid diagrams, quoted labels)
- Regenerated README.md (arah² / arah2bot naming, canonical clone URL)
- New per-package READMEs: theme/, bot/, web/
- Verified 13 docs against the live codebase (2 fix iterations + 2 residual
  corrections); corrected 56 stale claims across AGENTS/DESIGN/IDEAS/GSD_FIX

docs/CONFIGURATION.md

@@ -161,8 +161,8 @@ Key notes:
 
 ## Build and run scripts
 
-Root `package.json` (workspaces: `theme`, `bot`, `web`; all packages are `"private": true`, ESM via
-`"type": "module"`):
+Root `package.json` (workspaces: `theme`, `bot`, `web`; the root, `bot`, and `web` packages set
+`"private": true` while `@araharah/theme` omits the field, ESM via `"type": "module"`):
 
 | Command | Description |
 | --- | --- |