infill : add new example + extend server API (#3296)
* vvhg-code-infill (#1)
* infill in separate example (#2)
* reverted changes to main and added infill example
* cleanup
* naming improvement
* make : add missing blank line
* fix missing semicolon
* brought infill up to current main code
* cleanup
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Co-authored-by: Cebtenzzre <cebtenzzre@gmail.com>
