[Feature request] Allow platform-specific pkgdeps for non default pkgdeps files

[jim-bcom]

PROBLEM

• When using remaken install/bundle*/info... commands, which require a pkgdeps file, if no pkgdeps file is specified, the tool expects a file named packagedependencies.txt.

• The tool can also process platform-specific dependencies if files named packagedependencies-linux.txt or packagedependencies-win.txt exist, as described by the documentation here:

https://github.com/b-com-software-basis/remaken?tab=readme-ov-file#packagedependenciestxt-dependency-file

• It is possible to explicitely specify a pkgdeps file to remaken, for example:

remaken info mypkgdeps.txt
remaken bundleXpcf --pkgdeps mypkgdeps.txt [...]
...

• BUT, when specifying a custom pkgdeps, we lose the platform specific deps feature. Even if we explicitely pass a file named packagedependencies.txt, platform-specific files are then ignored. Only the deps listed in this file are processed.

SUGGESTED SOLUTION

• A workaround can be to write one complete pkgdeps file per platform, thus duplicating the common part.
• If [bundleXpcf/bundle] Accept multiple configuration files/packagedependency files  #32 leads to being able to pass multiple files, then we'd be able to explicitely pass the common part and the platform specific part, removing the duplication.

But both of these approaches require knowing which one to pick, instead of having an automatic selection made by remaken like in the default case.

• Add support for automatic selection of platform-specific pkgdeps files for custom pkgdeps as it is done for the default pkgdeps file.

The rule could be made general for exemple by searching for <pkgdeps file name>[-lin|-win|...] files, for example.