Enable tooltips for the commit hashes when handling conflicts

[DarkDefender]

Before, you couldn't easily see the commit hash authors or message when resolving file conflicts. Now you can hover over the hashes to get a tooltip with a bit more information.

I have to admit that this is my first time working with C# and Avalonia, so I'm not sure how hacky my solution is... 😅

[love-linger]

• First, we already shows the tooltip in In-Progress Bar
  

• It's better to supports to navigate to selected commit just like another well-known GIT client Fork

[DarkDefender]

It's better to supports to navigate to selected commit just like another well-known GIT client Fork

I agree! I see you already added it as well! Thanks!

First, we already shows the tooltip in In-Progress Bar

Ah, I missed that!
Wouldn't it be good to show tooltips when hovering over the commit hashes in the conflict area as well though?

Feels weird to me that you can click on them now but not hover over them (like you can for the parent hash in the commit information view).

To me, when I see orange text, I assume that I can hover over them for tooltips as that seems to be the design language used here. IE: If orange, you can hover for more information. If orange and underline, you can also click on it to navigate.

[DarkDefender]

One of the reasons I added the hover tooltop is because the In-Progress Bar doesn't show up for stash conflicts.
I have a change for making for info show up about stashed changes here: #1067

Even if there was a In-Progress Bar for stash conflicts, I would still like to also be able to hover over the hashes in the conflict view. I just wanted to add a bit more context to why I created this PR.

[DarkDefender]

I've cleaned up my changes to be much more simpler like in your changes! Thanks for showing me how it is done. :)

With your "click to navigate to sha" changes, now the hashes work just like in the "commit message" window.

[love-linger]

I've pushed my implementation for this feature. Because of some commits already exist in SourceGit.ViewModels.Conflict, it not necessary to fetch them on first-time-hover.

[DarkDefender]

Thank you so much!