Add ESLint promise handling rules to prevent Cloudflare Workers errors

.changeset/eslint-promise-rules.md

@@ -0,0 +1,7 @@
+---
+'skeleton': patch
+---
+
+Add TypeScript ESLint rules for promise handling to prevent Cloudflare Workers errors
+
+Added `@typescript-eslint/no-floating-promises` and `@typescript-eslint/no-misused-promises` rules to help prevent "The script will never generate a response" errors when deploying to Oxygen/Cloudflare Workers. These rules ensure promises are properly handled with await, return, or void operators, as recommended by [Cloudflare's error documentation](https://developers.cloudflare.com/workers/observability/errors/#the-script-will-never-generate-a-response-errors).

eslint.config.js

@@ -279,6 +279,8 @@ module.exports = [
       'jsx-a11y/control-has-associated-label': 'off',
       'jsx-a11y/label-has-for': 'off',
       '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/no-floating-promises': 'error',
+      '@typescript-eslint/no-misused-promises': 'error',
     },
   })),
 

templates/skeleton/eslint.config.js

@@ -177,6 +177,8 @@ export default [
       '@typescript-eslint/ban-ts-comment': 'off',
       '@typescript-eslint/naming-convention': 'off',
       '@typescript-eslint/no-non-null-asserted-optional-chain': 'off',
+      '@typescript-eslint/no-floating-promises': 'error',
+      '@typescript-eslint/no-misused-promises': 'error',
     },
   },
   {