feature: adding --gameEngineVersion flag to shipthis game ship to override the Godot version for the current build(s)

[madebydavid]

Description

Adding a --gameEngineVersion flag to the shipthis game ship command which sets that value for only the current build(s). If this flag is not present then the value from the shipthis game details command is used.

This is to resolve #21 - it will make it easier to run tests on different versions of Godot and so should make development of shipthis easier too.

What's changed

• Backend and agent changes are not included here.
• Extended the ShipGameFlags type and extended the options passed when starting jobs

[madebydavid]

Documentation will be needed for this, ideally:

• update the md file for the ship command to include the new help output
• update the same file to include some notes about using this flag

[madebydavid]

docs done, ready for review

[madebydavid]

I did some testing and found the whole project was still serialized in the config file. Made a small change to resolve this.

I have tested:

• shipthis game create
• shipthis game wizard ios
• shipthis game wizard android
• shipthis game ship
• shipthis game details