Add a URL and query parameter construction section to
contrib/claude/go-style.md requiring net/url (url.JoinPath,
url.Values, url.Parse) instead of fmt.Sprintf or string
concatenation.
Create contrib/claude/ts-style.md with matching TypeScript
rules requiring URL and URLSearchParams instead of template
literals or string concatenation.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>