Generate eGUIDs from GUIDs

After GUIDs are obtained, these additional steps should be followed to obtain eGUIDs:

Add random noise in alternating bytes - a byte of GUID followed by a byte of noise. E.g.: 6a547f...1d becomes 6abc54457fa3...1d98.
Encrypt the result with a public key. The public key should be placed in a configuration file eGUID-config.json with the format:
```
{
key: '....'
}
```
Update the UI: replace occurrences of GUID with eGUID:

data-team-uhn / guid-generator-web