feat: develop example content for openmfp update

[rrogoda]

Develop example content for OpenMFP's local getting started

Changes:

Add dedicated WebComponent for showcase examples

• Add example for "Definition of an Entity"
• Add example for "Defining a iframe based Micro Frontend integration"
• Add example for "Update of browser path when navigating in the Microfrontend's virtualtree"
• Add example for "Showcasing a Dashboard like page that integrates one or two example Web Components"

Refers to :
#76

[CLAassistant]

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3 out of 4 committers have signed the CLA.

✅ nexus49
✅ rrogoda
✅ lpgarzonr
❌ Rafał Rogoda

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[nexus49]

Smaller feedback:

• Center icons with Text
  

• Use Code formatting for when "code" is quoted, see: https://sap.github.io/fundamental-styles/?path=/docs/sap-fiori-components-code--docs
  

• consistent text formatting, i'd say lets stick to normal text and code blocks. Try to avoid adding more italic or underlined text

• the yellow buttons are quite bright, maybe experiment with a less bright color like a grey .

• I've also asked @lpgarzonr to proofread the 4 paragraphs with examples and to align them with our documentation from a wording point of view

[lpgarzonr]

LGTM