[WAL-707] Migrate BW examples (part1)

[Ivan-Mahda]

Purpose

Migrate examples from BW git repository to dApp examples, in order to keep them in one place and organised manner (Part 1)

Changes

Remove example projects from BW repository

Corresponding add PR Link

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

[soerenbf]

Looks good 😄