Codestart files processing order and data override order needs to be relevent

[ia3andy]

Thanks to #11752, the order is the same for file processing and data overriding:

• language is first as it defines the language for the others
• buildtool is second as it is also important for the others
• project then can give overrides on those
• config and tooling could be at the same level
• code needs to be last

For now I think it doesn't really matter as soon as the order is consistent between run, but I am creating an issue for this as the order for data overriding may need to be different from the order of processing. I don't think we want the examples codestarts to override base data.

Originally posted by @ia3andy in #11752 (comment)

[quarkusbot]

/cc @quarkusio/devtools