feat(ts): improve module declarations (#957)

frontend/env.config.d.ts

@@ -1 +1,3 @@
-declare module 'postcss-easing-gradients';
+declare module 'postcss-easing-gradients'
+declare module 'vite-plugin-sentry/client'
+declare module 'virtual:vite-plugin-sentry/sentry-config'

frontend/tsconfig.app.json

@@ -2,6 +2,7 @@
   "extends": "@vue/tsconfig/tsconfig.dom.json",
   "include": [
     "env.d.ts",
+    "env.config.d.ts",
     "src/**/*.d.ts",
     "src/**/*",
     "src/**/*.vue",