Symlink repo LICENSE and README.md to module

[bufdev]

I noticed on https://buf.build/bufbuild/protovalidate that there was no README.md. This is better than nothing - the Buf Logo at the top might break, but at least we'll have something here. We can make a custom readme in the future if we want.

This also symlinks LICENSE as opposed to copying it.

[rodaine]

We had this originally but it messed up stuff with the managed modules not following symlinks, iirc. cc @unmultimedio

[bufdev]

I think rsync should work, it has --copy-links set https://github.com/bufbuild/modules/blob/61f8683d3c95dbb3c65faecec8d21d0b547cd41d/scripts/fetch.sh#L48, @unmultimedio what do you think

[unmultimedio]

Yeah that --copy-links option was added after we started managing protovalidate in the modules repo. I also think this should work.

[unmultimedio]

I can manually test it, gimme a few mins I'll report back.

[unmultimedio]

Confirmed, it should work fine:

➜  protovalidate git:(license-readme) rsync --archive --prune-empty-dirs --relative --copy-links --include-from="/Users/jfigueroa/dev/buf/modules/modules/static/bufbuild/protovalidate/rsync.incl" . ../../../tmp                        
➜  protovalidate git:(license-readme) tree ../../../tmp
../../../tmp
├── LICENSE
├── README.md
├── buf
│   └── validate
│       ├── expression.proto
│       ├── priv
│       │   └── private.proto
│       └── validate.proto
├── buf.lock
└── buf.yaml

4 directories, 7 files

Both README and LICENSE are present.

[rodaine]