Product model, Weekly schedule, translation updates, docs update.

Changes

• Show product model on device info page @astrandb (#348)
• Added a new service to set weekly schedule @olalid (#347)
• Update German translation @tobiasbayer (#350)
• Romanian strings update v01 @valentinobianco (#342)
• Updating readme @bortek (#341)

Development environment and tools

• New devcontainer @astrandb (#351)