feat: demo page with navbar

[sebastianmusial]

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

No links to important sources.

Issue Number: N/A

What is the new behavior?

Demo page with navbar - links to github, npm, documentation etc.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information