Breakage caused by removal of "Arduino_TensorFlowLite" library from Library Manager

The "**Arduino_TensorFlowLite**" library dependency of these tutorials was removed from Library Manager at the request of the TensorFlow Lite Micro maintainers (https://github.com/arduino/library-registry/pull/1748).

That removal impacts this project in several ways:

## Documentation

The installation instructions specify installation of the library from Library Manager:

https://github.com/arduino/ArduinoTensorFlowLiteTutorials/blob/master/GestureToEmoji/exercises/exercise1.md#arduino-libraries

> Install the following Arduino libraries using the Library manager:
>
>- TensorFlow Lite library (search for "Arduino_TensorFlowLite")

This is no longer possible.

TensorFlow's library must be installed manually. The library's documentation provides instructions:

https://github.com/tensorflow/tflite-micro-arduino-examples#how-to-install

## Code

TensorFlow's library does not contain the file `tensorflow/lite/version.h`, so the code that contains an `#include` directive for this header no longer compiles:

```text
home/runner/work/ArduinoTensorFlowLiteTutorials/ArduinoTensorFlowLiteTutorials/GestureToEmoji/ArduinoSketches/IMU_Classifier/IMU_Classifier.ino:28:10: fatal error: tensorflow/lite/version.h: No such file or directory
#include
^~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
```

## CI

The repository contains a GitHub Actions workflow that provides a "smoke test" on relevant changes to the project by compiling the sketches:

https://github.com/arduino/ArduinoTensorFlowLiteTutorials/blob/master/.github/workflows/compile-sketches.yml

The workflow is [configured](https://github.com/arduino/compile-sketches#libraries) to install the dependency from Library Manager, which now fails:

```text
Running command: /home/runner/bin/arduino-cli lib install Arduino_TensorFlowLite
Error installing Arduino_TensorFlowLite: Library 'Arduino_TensorFlowLite' not found
```

Start with the installation section in GestureToEmoji/exercises/exercise1.md, the IMU_Classifier sketch, and .github/workflows/compile-sketches.yml. Check how the TensorFlow library is installed and which header the sketch includes, then verify that the documentation and workflow use the supported installation path and that the sketches compile successfully.

Written by the indexing model from the issue text.