**refactor(cli): remove obsolete command and streamline TextEncoder/TextDecoder usage**

- Removed the `test-tensorflow-textencoder` command from `cli.ts` as part of deprecating redundant tests and unused CLI functionality.
- Simplified `TextEncoder` and `TextDecoder` definitions in `brainy-wrapper.js` by replacing direct constructor usage with shorthand properties within a utility object.

This refactor reduces unnecessary complexity in CLI commands and improves maintainability by aligning with current project goals and streamlined test structure.

cli-package/brainy-wrapper.js

@@ -31,9 +31,9 @@ if (
           isTypedArray: (arr) => {
             return !!(ArrayBuffer.isView(arr) && !(arr instanceof DataView))
           },
-          // Use native TextEncoder and TextDecoder
-          TextEncoder: TextEncoder,
-          TextDecoder: TextDecoder
+          // Instead of using constructors directly, create a utility object with constructors
+          TextEncoder,
+          TextDecoder
         }
 
         // Initialize TextEncoder/TextDecoder instances