feat(games): add the generic d6 oracle game package

Serves as the reference implementation of the game package contract:
rules, spark tables, character backgrounds, and an example command.

games/generic/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "@solo/game-generic",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "description": "System-agnostic d6 oracle play for solo journaling.",
+  "main": "index.js",
+  "exports": {
+    ".": "./index.js"
+  },
+  "dependencies": {
+    "@solo/oracle": "workspace:*"
+  }
+}