Fixes #115

Remove the `osc-min` dependency and implement `toBuffer` and `fromBuffer` functions according to the OSC specification.

* **package.json**
  - Remove the `osc-min` dependency.
  - Update the `imports` section to include `#osc` pointing to `internal/osc.mjs`.

* **lib/Client.mjs**
  - Remove the import of `osc-min`.
  - Import `toBuffer` from `#osc`.
  - Update the `send` method to use `toBuffer` from `#osc`.

* **lib/Server.mjs**
  - Remove the import of `#decode`.
  - Import `fromBuffer` from `#osc`.
  - Update the `_sock.on('message')` handler to use `fromBuffer` from `#osc`.

* **internal/osc.mjs**
  - Implement the `toBuffer` function according to the OSC specification.
  - Implement the `fromBuffer` function according to the OSC specification.

* **test/test-osc.mjs**
  - Add unit tests for `toBuffer` function.
  - Add unit tests for `fromBuffer` function.

* **rollup.config.mjs**
  - Remove `osc-min` from the `external` array in the `walkLib` and `walkTest` functions.
  - Add `#osc` to the `external` array in the `walkLib` and `walkTest` functions.

* **lib/internal/decode.mjs**
  - Delete the file.

* **test/test-decode.mjs**
  - Delete the file.

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/MylesBorins/node-osc/issues/115?shareId=XXXX-XXXX-XXXX-XXXX).