Feature: Spoolman Widget

[fgeck]

Proposed change

Adds a Spoolman widget. Each spool will be rendered into a dedicated <Block> showing the filament name and remaining filament in %.

Widget:

Spoolman:

Closes #3958

Type of change

• New service widget

Checklist:

• If applicable, I have added corresponding documentation changes.
• If applicable, I have reviewed the feature and / or service widget guidelines.
• I have checked that all code style checks pass using pre-commit hooks and linting checks.

[shamoon]

Works great. A couple things, and this needs a re-base.

[shamoon]

Suggested change

	Keep track of your inventory of 3D-printer filament spools.
	Spoolman is a self-hosted web service designed to help you efficiently manage your 3D printer filament spools and monitor their usage. It acts as a centralized database that seamlessly integrates with popular 3D printing software like OctoPrint and Klipper/Moonraker. When connected, it automatically updates spool weights as printing progresses, giving you real-time insights into filament usage.

[fgeck]

started incorporating your feedback yesterday.
Need to test and will push again in the upcoming days.

[fgeck]

Finally again ready for review @shamoon

I added an option to filter spools by their id.

Spoolman:

Config:

widget:
          type: spoolman
          url: https://spoolsman.io
          spoolIds:
            - 2
            - 5       # does not exist, but is allowed

Result in homepage:

Ps.:
I hope this will be a squash merge as the commit history of my branch is quite messy.

[shamoon]

Please have a read about git rebasing or merge commits. We squash commits anyway but this is a very messy history that makes life a bit more complicated for maintainers.

[shamoon]

Please see my code changes:

1. Theres no need for a helper function that is very short, used once and is pretty clear in what it does.
2. See updated syntax for them to be simpler.
3. Better handle the loading blocks

Thanks for your contribution