add EWW_IPV4/6 magic variable

[Lanpingner]

Description

This PR creates 2 magic variables that can retrieve all IPV4/6 addresses on all interfaces

Usage

To retrieve all IPV4 address
(label :text EWW_IPV4)

To retrieve all IPV6 address
(label :text EWW_IPV6)

Checklist

Please make sure you can check all the boxes that apply to this PR.

• [✓] All widgets I've added are correctly documented.
• [✓] I added my changes to CHANGELOG.md, if appropriate.
• [✓] The documentation in the docs/content/main directory has been adjusted to reflect my changes.
• [✓] I used cargo fmt to automatically format all code before committing

[Lanpingner]

Hi @elkowar
Could you please help me why does github not trigger the build.yml workflow

[Lanpingner]

Hi @elkowar
I know its a big thing to ask could you please merge the pull request as i have another pull request which close this
String Methods issue but by accident i created this pull request from the master breach which means i can't open a pull request as the new pull request will also include the changes of this.