chore: merge the yocto scripts into yocto manifest

[MoeMahhouk]

This commit integrates the yocto-scripts repository directly into yocto-manifests, consolidating all build configurations under a shared config_files directory.

Key changes:

• Create config_files/ directory with profile-specific subdirectories:
  • tdx-base/: basic image configuration
  • tdx-bob/: searcher node configuration
  • tdx-rbuilder/: reth/lighthouse node configuration
• Move common Makefile to config_files/
• Update manifest XMLs to reference config_files paths:
  • Point copyfile operations to profile-specific configurations
  • Maintain consistent path references
• Keep profile-specific layer configurations isolated

The consolidation simplifies our repository management while maintaining clear separation between different build profiles. Each profile maintains its own setup script and patches, enabling independent builds

[MoeMahhouk]

This will change to revision main instead later. But for testing purposes, I set it up to this branch to check it out first

[Ruteri]

I like the refactor, esp the readmes :)
I'd update this repo's main readme to point to the downstream readmes, and to say a word about where to find what

Separately, config_files doesn't quite seem to fit. images/ maybe, or definitions or something with build

[Ruteri]

Does it make sense to have this in config_files?

[MoeMahhouk]

I had it first for each of the products separately. But I noticed that they all have the same Makefile as a common and use it. So I put it outside instead.
I can create a directory called common and put it in there instead. 🤔

[MoeMahhouk]

I'd update this repo's main readme to point to the downstream readmes, and to say a word about where to find what

Good Idea, I will update it

Separately, config_files doesn't quite seem to fit. images/ maybe, or definitions or something with build

I had it first called profiles but then I thought that it actually only contains setup script and patch files. I have no strong opinion on renaming it if we have better naming