feat(content): add action story hints and merge GameContent

src/content/schema.ts

@@ -32,6 +32,8 @@ export const actionDefSchema = z.object({
   costs: z.array(resourceAmountSchema).default([]),
   yields: z.array(resourceAmountSchema).min(1),
   unlock: unlockDefSchema.optional(),
+  storyHint: z.string().min(1).optional(),
+  storyTooltip: z.string().min(1).optional(),
 });
 
 export type ResourceDef = z.infer<typeof resourceDefSchema>;