Specialize our URI class rather than leaning on Ruby's URI::Generic as a URL

[jeremy]

The initial URI implementation leans on Ruby's URI::Generic and acts as a URL, using the hostname as the app namespace and the first two path segments as model class and id.

Let's formalize this with an actual Global ID URI scheme that takes advantage of Ruby's parser and validation.

[jeremy]

Simplified parsing and component validation:

• Validate: 37beb80
• Use URI::Error: c0a6ed5

[kaspth]

Fixed in 608c2b3

[jeremy]

🤘 thank you @sebasoga and @kaspth !