Systray icons added - Issue #925

[Paulchen-Panther]

Summary

As already described in Issue #925, I added icons to the Hyperion Systray. The system's own symbols are no longer used, otherwise graphic inconsistencies may arise. The systray symbol has also been replaced by a more modern one.
Many thanks to our graphic designer dev. @mkcologne 👍

Preview:

Windows

Linux

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

If changing the UI of web configuration, please provide the before/after screenshot:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing setups:

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's body (e.g. Fixes: #xxx[,#xxx], where "xxx" is the issue number)

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated (docs/docs/en)
• Related tests have been updated

PLEASE DON'T FORGET TO ADD YOUR CHANGES TO CHANGELOG.MD

• Yes, CHANGELOG.md is also updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:
Fixes: #925

[hyperion-project]

Hello @Paulchen-Panther 👋

I'm your friendly neighborhood bot and would like to say thank you for
submitting a pull request to Hyperion!

So that you and other users can test your changes more quickly,
you can find your workflow artifacts here.

If you make changes to your PR, i create a new link to your workflow artifacts.

Best regards,
Hyperion-Project