[Feature Request] Change the icon

[marimo-nekomimi]

I've also posted the same problem to a server issue.
Reference:[Feature Request] Change the icon (and favicon) · Issue #973 · Suwayomi/Suwayomi-Server Suwayomi/Suwayomi-Server#973
However, the client is a separate issue, so I will post it here as well.

The name of the project has changed from "Tachidesk" to "Suwayomi."
As a result, I think that the "立" icon, which means "Tachidesk" is no longer appropriate.
Maybe it's time to change the icon.

I think this is also effective in preventing confusion for new users.

Personal opinion
"Suwayomi" can be written as "すわよみ", "スワヨミ", or "座り読み".
We might be able to use "スワ" or "座" for the icon.
Or I personally think "読", which simply means to read, is good.