Added ability to display a Lucid icon in the Step, instead of the default avatar

[Allaoua9]

[hayescode]

@Allaoua9 if you're adding a property to the step class you'll need to add it to all of the data layers.

[Allaoua9]

@hayescode i've updated the SQL datalayers to include the icon on INSERT.

That also means people using SQL databases would need to create a migration to add new icon field...

[Allaoua9]

UP @hayescode @asvishnyakov @sandangel

[PhenSG]

Hi, when will this nice enhancement be added to the Chainlit framework? What's blocking?

[sandangel]

sr for the delay, this LGTM

[sandangel]

@Allaoua9 can we use step metadata instead? This will avoid DB migration

[Allaoua9]

@Allaoua9 can we use step metadata instead? This will avoid DB migration

Hi @sandangel Let me check that and get back to you.

[Allaoua9]

@hayescode @sandangel
I have updated the code so that we store icon in metadata to avoid applying a database migration.

Should we move forward with this PR ?

Thanks