Add UUID for all DDF files

[Zehir]

The UUID serves the following purposes:

• It provides a unique identifier for a DDF, which remains consistent even if the file is relocated.
• It facilitates the grouping of bundles that contain different versions of the same file.
• Each DDF should have an unique UUID. For the new DDF an new UUID will be generated when the PR get merged.
• They are only used by the DDF bundle store.

The UUID has been appended to all existing DDFs in the repository.

The pull request was created using the following command:

for dir in $(find . -type d);
  do   ddf-tools bulk uuid --store-url {URL} --store-token {TOKEN} $dir;
done

The UUID was inserted immediately after the schema. Maintaining the formatting and using the same newline character, either \r\n or \n

For new DDFs that are currently in a pull request, they will be updated by the new validation action at a later stage.

[bcutter]

What happens to custom DDFs without a set UUID? No benefits as listed in the PR description or any side effects?

[bcutter]

What happens to custom DDFs without a set UUID? No benefits as listed in the PR description or any side effects?

@Zehir