#1308: trigger migration for old versions

[jan-vcapgemini]

Addresses/Fixes: #1308

Implements:

• simple check for existing .devon.software.version and software/workspaces to execute migration script on old versions

[alfeilex]

I tested your commit with following tasks:

• setup an older ide instance
• run devon ide update scripts
• add your code to scripts/environment-project
• run a command starts with devon <...> or just devon
• the migration should be start