feat: add icons and possibility for multiple links to portfolio

[Sohn123]

Description

I want to display multiple links for one portfolio item and use icons there. I changed the data/portfolio.yml to contain a list with multiple link items. Every item consists of url, text and icon. text and icon are optional. This is a breaking change for existing configurations. I adapted the exampleSite accordingly.

Issue Number:

• Should I create one?

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Checklist

Yes, I included all necessary artefacts, including:

• [ ] Tests
• [ ] Documentation
• [ ] Implementation (Code and Ressources)
• [ ] Example

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Testing Checklist

Yes, I ensured that all of the following scenarios were tested:

• [ ] Desktop Light Mode (Default)
• [ ] Desktop Dark Mode
• [ ] Desktop Light RTL Mode
• [ ] Desktop Dark RTL Mode
• [ ] Mobile Light Mode
• [ ] Mobile Dark Mode
• [ ] Mobile Light RTL Mode
• [ ] Mobile Dark RTL Mode

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[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

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No Coverage information
0.0% Duplication

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[lxndrblz]

@Sohn123 Thanks for the PR. I have added an fallback for the previous way of setting up links in the Portfolio. Please let me know, what you think.