Allow : and @ unescaped in URL path and query

[QuinnHarris]

RFC 3986 explicitly allows both : and @ to appear unescaped in URL path segments and query strings (pchar):

pchar = unreserved / pct-encoded / sub-delims / ":" / "@"

However, zio-http currently percent-encodes these characters even when they appear in contexts where they are treated as data rather than delimiters.

This PR updates URL rendering to allow : and @ to remain unescaped in path and query segments both using the encodeComponentInto function.

I specifically required this change with the google validateAddress with URL https://addressvalidation.googleapis.com/v1:validateAddress that does not work when its percent-encodes.

References

• RFC 3986 §3.3 (Path)
• RFC 3986 §3.4 (Query)

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