Codestart customized package and class and more

[ia3andy]

Fixes #11154

• Add dynamic path support to codestart structure, ex: /{package-name.dir}/{my-class-key}.java which will be filled with data (my-package-name.dir will look for my-package-name and transform it to directory path).
• local codestart data is now only overridable by input data prefixed with codestart name (ex: resteasy-example.resource.class-name to define local data resource.class-name). Shared data still doesn't need a prefix.
• Extract all "Quarkus Project" related logic to devtools-common and made that part cleaner using a builder
• Use dynamic paths in resteasy-example and commandmode-example
• Plug -Dpath and -DclassName from Maven plugin to codestarts
• Added tests for all this

[ia3andy]

The native tests are all passing on my fork CI.

[ia3andy]

JDK 8 test passed on my local CI and Windows is failing on doc:

[ia3andy]

I don't think I am going to have everything ready to have Codestarts default in 1.8 CR1, missing:

• Add some logging
• Add Maven plugin logic to make codestart default:
  • default: use codestarts (codestarts with tag compatibility-issues are excluded)
  • --legacy use legacy codegen
  • --codestarts=.. select custom codestarts (allow ones with compatibility-issues)

@maxandersen @gsmet this will not be large PRs, maybe they can come in the next release?

[ia3andy]

FYI with this PR, we don't have to change the doc.

[ia3andy]

@quarkusio/devtools this PR is quite urgent as it targets 1.8.0