feat(coding-agent): added URL selectors with :raw and line range syntax to read command

- Added support for embedded URL selectors with `:raw` and `:L#-L#` line range syntax in read command.
- Implemented `parseReadUrlTarget()` function to parse and validate URL read targets with line range support.
- Updated read CLI to delegate URL inputs through read tool pipeline instead of treating as local file paths.
- Added comprehensive test coverage for URL selector parsing and CLI URL delegation.
- Refactored URL handling in read tool to use structured `ParsedReadUrlTarget` object.

packages/coding-agent/test/cli/read-cli.test.ts

@@ -0,0 +1,33 @@
+import { afterEach, describe, expect, it, vi } from "bun:test";
+import * as os from "node:os";
+import * as path from "node:path";
+import { runReadCommand } from "@oh-my-pi/pi-coding-agent/cli/read-cli";
+import { Settings } from "@oh-my-pi/pi-coding-agent/config/settings";
+import * as scrapers from "@oh-my-pi/pi-coding-agent/web/scrapers/types";
+
+describe("runReadCommand URL handling", () => {
+	afterEach(() => {
+		vi.restoreAllMocks();
+	});
+
+	it("delegates URL inputs through the read tool pipeline", async () => {
+		const cwd = path.join(os.tmpdir(), "read-cli-url-test");
+		const settings = Settings.isolated({ "fetch.enabled": true });
+		const pageUrl = "https://example.com/cli-read";
+		const consoleLogSpy = vi.spyOn(console, "log").mockImplementation(() => {});
+		vi.spyOn(Settings, "init").mockResolvedValue(settings);
+		vi.spyOn(scrapers, "loadPage").mockResolvedValue({
+			ok: true,
+			status: 200,
+			contentType: "text/plain",
+			finalUrl: pageUrl,
+			content: "CLI URL content",
+		});
+		const cwdSpy = vi.spyOn(process, "cwd").mockReturnValue(cwd);
+
+		await runReadCommand({ path: pageUrl });
+
+		expect(cwdSpy).toHaveBeenCalled();
+		expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining("CLI URL content"));
+	});
+});