all socs: generate west manifests

[natto1784]

Manifests for west, inspired by the mcupsdk_west branch but based on current main.

All files in this patchset are generated by a small script I wrote here that converts repo manifests to west manifests. Can use the following command for running it recursively:

find . -type f -name "*xml" | while IFS= read -r file; do echo $file; ~/repotowest.py "$file" "${file%.xml}.yml"; done

The reason I didn't rebase the mcupsdk_west branch and add the changes was to avoid clutter in this PR. Feel free to suggest changes or create a new branch for merge.