remove dependency on kleur

package.json

@@ -36,7 +36,6 @@
     "test": "uvu tests --require tsm --ignore \"fixtures\" --ignore \"helper.ts\""
   },
   "dependencies": {
-    "kleur": "^4.1.5",
     "log-symbols": "^7.0.0"
   },
   "devDependencies": {

src/index.ts

@@ -1,10 +1,11 @@
-import { bgRed } from 'kleur/colors';
 import logSymbols from 'log-symbols';
 import { resolve } from 'node:path';
 import { cwd, exit } from 'node:process';
 import { safeParse, type InferIssue, type ObjectSchema } from 'valibot';
 import { loadEnv, normalizePath, type Plugin } from 'vite';
 
+// TYPES
+
 type PluginOptions = {
 	/**
 	 * Setting this to `true` will include unprefixed environment variables in the validation. This is useful
@@ -40,6 +41,8 @@ type PluginOptions = {
 	throwError?: boolean;
 };
 
+// EXPORT
+
 /**
  * Exports a Vite plugin that validates environment variables against a schema.
  * @param schema
@@ -123,6 +126,20 @@ export default function ValibotEnvPlugin<T extends ObjectSchema<any, any> = Obje
 	};
 }
 
+// HELPERS
+
+const open = '\u001B[41m';
+const close = `\u001B[49m`;
+
+/**
+ * Wrap string in ANSI escape sequences for red background colour.
+ * @param input
+ * @returns
+ */
+export function bgRed(input: string): string {
+	return `${open}${input}${close}`;
+}
+
 /**
  * Logger for printing well-formed schema issues.
  * @param issue