fix(cli): ensure .env.local overrides .env values in dev command

The ENVVAR_FILES array listed .env before .env.local, but dotenv uses
first-match-wins when given an array of paths. This meant .env always
took precedence over .env.local, contrary to the standard convention
used by Next.js, Vite, and other frameworks.

Reversed the array order so more specific files (.env.development.local,
.env.local) are listed first and take proper precedence.

Fixes #2999

Author: deepshekhardas

packages/cli-v3/src/utilities/dotEnv.ts

@@ -3,10 +3,10 @@ import { resolve } from "node:path";
 import { env } from "std-env";
 
 const ENVVAR_FILES = [
-  ".env",
-  ".env.development",
-  ".env.local",
   ".env.development.local",
+  ".env.local",
+  ".env.development",
+  ".env",
   "dev.vars",
 ];