Matching entities tutorial.

[wiktorlazarski]

Matching entities tutorial.

PR description

Introducing a Google Colab that contains a tutorial showing how to use open-iris to perform matching of iris templates.

Type

• [x] Feature

Checklist

• [x] I've made sure that my code works as expected by writing unit tests.
• [x] I've checked if my code doesn't generate warnings or errors.
• [x] I've performed a self-review of my code.
• [x] I've made sure that my code follows the style guidelines of the project.
• [x] I've commented hard-to-understand parts of my code.
• [x] I've made appropriate changes in the documentation.