Filter out registry specific nested modules

[joelwass]

Currently we just search for package manifests within the root of each repository. If we search recursively the entire project using https://docs.github.com/en/github/searching-for-information-on-github/searching-code then, if someone accidentally pushes node_modules (or other language equivalent), our distribute org donation could take exponentially longer than expected (resulting in an error).

We need to filter out all search results when searching for package manifests than include "node_modules" or the "node_modules" language equivalent. This would enable us to distribute donations to all repo deps we find, no matter how nested.

example branch here: https://github.com/flossbank/distribute-org-donations/tree/path2