fix: import process for improved Deno compatibility (#13204)

Author: benmccann

packages/svelte/scripts/check-treeshakeability.js

@@ -1,5 +1,6 @@
 import fs from 'node:fs';
 import path from 'node:path';
+import process from 'node:process';
 import { rollup } from 'rollup';
 import virtual from '@rollup/plugin-virtual';
 import { nodeResolve } from '@rollup/plugin-node-resolve';

packages/svelte/scripts/generate-types.js

@@ -1,4 +1,5 @@
 import fs from 'node:fs';
+import process from 'node:process';
 import { fileURLToPath } from 'node:url';
 import { createBundle } from 'dts-buddy';
 

packages/svelte/src/compiler/validate-options.js

@@ -1,3 +1,5 @@
+import process from 'node:process';
+
 /** @import { ModuleCompileOptions, ValidatedModuleCompileOptions, CompileOptions, ValidatedCompileOptions } from '#compiler' */
 import * as e from './errors.js';
 import * as w from './warnings.js';