chore: push all design docs, V2 plan specs, and current working state

Includes AirPlan design documents, AircOding-alpha1-plan, AirPlanV2,
AirPlan-ParaV2, AirPlan-Para V1 reference docs, and all working code
changes across packages.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/contracts/tsconfig.json

@@ -1,8 +1,10 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "composite": true,
+    "declaration": true,
     "outDir": "./dist",
     "rootDir": "./src"
   },
   "include": ["src"]
-}
+}