feat: Merge isohash functionality into smarthash for cross-environment hash support

- Updated test files to use new tapbundle import from @git.zone/tstest.
- Created a new plan for merging isohash into smarthash, detailing objectives and implementation steps.
- Added browser-specific tests for SHA256 hashing functions in test/test.browser.ts.
- Implemented browser-compatible hashing functions in ts_web/index.ts using Web Crypto API.
- Introduced plugins for environment detection and JSON handling in ts_web/plugins.ts.
- Ensured that existing smarthash functionality remains intact and consistent across environments.

test/test.ts

@@ -1,4 +1,4 @@
-import { tap, expect } from '@push.rocks/tapbundle';
+import { tap, expect } from '@git.zone/tstest/tapbundle';
 import * as fs from 'fs';
 
 import * as smarthash from '../ts/index.js';
@@ -52,4 +52,4 @@ tap.test('should create md5hash from string', async () => {
   expect(md5Hash).toEqual('c6f7c372641dd25e0fddf0215375561f');
 });
 
-tap.start();
+export default tap.start();