Add error handling example

[Danipulok]

Add error handling example

Add error handling example examples/error_handling.py where following features used:

• Using error handler: dp.error;
• Using error filter: ExceptionTypeFilter;
• Using error filter: ExceptionMessageFilter;
• Using command object: CommandObject;
• Getting bot instance passed to a handler;

My motivation is that currently using error handlers is not that obvious.

Type of change

• Documentation (typos, code examples or any documentation update)

How has this been tested?

Locally.
Also, make lint was used.

Test Configuration

• Windows 10
• Python version: 3.10.8

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works as expected
• New and existing unit tests pass locally with my changes
• My changes generate no new warnings or errors
• My changes are compatible with minimum requirements of the project
• I have made corresponding changes to the documentation

[github-actions]

✔️ Changelog found.

Thank you for adding a description of the changes

[JrooTJunior]

I think this information should also be added to the documentation, could you please add this to the "Handling events" section?

[Danipulok]

I think this information should also be added to the documentation, could you please add this to the "Handling events" section?

@JrooTJunior good day. I will add documentation during this week, thanks for checking the PR

[JrooTJunior]

@JrooTJunior good day. I will add documentation during this week, thanks for checking the PR

Any news?