Sdk v0.1 (#1)

PR:
- Included complete Network App samples,
- Complete developer path description,
- Refactored code structure,
- Complete doc upgrade.

---------

Co-authored-by: JorgeEcheva26 <jorge.echevarriauribarri.practicas@telefonica.es>
Co-authored-by: Daniel García <daniel.garciasanchez@telefonica.com>