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.

ts_web/plugins.ts

@@ -0,0 +1,8 @@
+// pushrocks scope
+import * as smartenv from '@push.rocks/smartenv';
+import * as smartjson from '@push.rocks/smartjson';
+
+export {
+  smartenv,
+  smartjson
+};