`azd template list` and `azd init` template option update

[SophCarp]

This is an initial change just to clean up the commands. A second issue will be made to create a more higher quality experience.

In both azd template list and azd init (template) option, replace curret experience with the following text then exit the interaction:

For Microsoft Ai Gallery visit https://azure.github.io/ai-app-templates/
For azd community gallery (awesome azd) visit https://azure.github.io/awesome-azd/

Select a template from the gallery, then run azd init -t [template name]

Then exit the interaction.

Giving the links to the galleries gives a more useful interaction than the current long list of templates.

[SophCarp]

This starts to address #66 #3964 and #5027

[SophCarp]

Assigning to @rajeshkamal5050, @kristenwomack for awareness.

[kristenwomack]

Very excited about this first step!

[weikanglim]

I'm not entirely opposed to the suggestion, although I do see great value in having a CLI experience that is streamlined and interactive.

I do believe we have rather huge usability concerns with the current listing. I'm wondering if we would consider taking a stab at making it better. I put forward a PR in #6264 just to see what changes I would suggest.

Repasting the comparison screenshots below.

Before:

After:

[weikanglim]

I do like the gallery URLs being printed out. I could see this as extremely helpful for discovery.

I would suggest printing out the gallery URLs when the user cancels out of the selection menu.

To browse all available templates in a web gallery, visit aka.ms/awesome-azd or aka.ms/ai-apps

[vhvb1989]

Maybe the problem is that this doesn't play well in all terminal sizes, @weikanglim
The screenshot you shared seems like a full wide screen - but it can get really ugly when you increase the size (like for a demo/screenshare), or simply because you are in a smaller screen.

I think we could explore adding some template-catalog extension where we can implement a full TUI program for which azd could just handle the list of templates with grpc layer (just brainstorming here).

[kristenwomack]

Yes, exactly @vhvb1989 -- part of the problem is screen size. See the images in #66

If a developer is initializing from selecting a template, maybe "select a template" firsts asks what for their preferred programming language to narrow down the list. With the repo URL slug, will people know what that is from the terminal if they don't have the context?

[JeffreyCA]

If we're considering a multi-column layout, maybe we can explore truncating some of the content so everything fits the terminal width without text wrapping around.

I've seen some tools behave in a way where for the selected entry only, the text is not truncated.

[weikanglim]

@kristenwomack @vhvb1989

Here's a screenshot with terminal size adjusted to less than 110 characters:

The content wraps, but personally it is still usable for me.

I implemented text truncation of the title at 70 characters which is quite generous. If we were designing this from ground up, I would recommend template names to be shorter (somewhere less than 60 or 40 characters ideally).