Fix x-ms-paths sorting for query-only paths

[Copilot]

compareUrl in the JSON schema sorter fails to sort x-ms-paths entries starting with ? (e.g. ?a=1, ?b=1). The function splits by / then calls .slice(1), which produces empty arrays for query-only paths, making them all compare as equal.

Fix: Split path and query portions before segment comparison. When path segments are equal (including both empty for query-only paths), fall back to lexicographic comparison of the query string.

// These x-ms-paths entries now sort alphabetically
@route("?b=1")
op one_q(): void;

@route("?a=1")
op two_q(): void;
// Output: "?a=1" before "?b=1"

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Autorest output doesn't sort x-ms-paths path that start with ?</issue_title>
<issue_description>

import "@typespec/http";

using Http;

@route("/b")
op one_p(): void;

@route("/a")
op two_p(): void;

// Here paths remain in the order they are defined not alpha sorted
@route("?b=1")
op one_q(): void;

@route("?a=1")
op two_q(): void;

Playground Link</issue_description>

<agent_instructions>Make sure our special sorting for paths and x-ms-paths handles sorting with hard coded query path too</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Autorest output doesn't sort x-ms-paths path that start with ? #4064

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