Add Url (net)

[vhrcgcom]

Description

Implement Url as a ValueObject in the net module.

Spec: valid URL, wraps url crate

Implementation checklist

• Create src/net/url.rs
• Implement ValueObject trait
• Add #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
• Export from src/net/mod.rs and prelude
• Unit tests: valid input · empty input · invalid format · normalisation
• Doc comment with # Example block
• Update status in ROADMAP.md from ⬜ to ✅

Implementation detail

Input / Output

	Type	Alias
Input	String	UrlInput
Output	String — normalised by the url crate	UrlOutput

Normalization

Parse with url::Url; the crate normalises scheme and host to lowercase and canonicalises the path.

Validation

Must be parseable as a URL by the url crate. Any scheme is accepted (unlike Website, which restricts to http/https). A host is required.

Notes

Uses the url crate already present as an optional dependency (dep:url). No new dependencies needed.

Extra methods

• scheme() -> &str — e.g. "https".
• host() -> Option<&str> — the hostname, if present.
• path() -> &str — the path component, e.g. "/api/v1".

References

• ROADMAP.md
• CONTRIBUTING.md