Increase documentation version

[DenTray]

How it should works:
on documentation saving, we should compare the current saving documentation with the actual documentation content. If there is some changes between them:

• actual documentation should be renamed to the configurable documentation file name with the version postfix (e.g. documentation_0_0_1.json)
• the current saving documentation content should has the version param increased (let's use the patch version 0.0.1 -> 0.0.2 -> 0.0.3) and be saved with the configurable filename (e.g. documentation.json)