feat: removed chunk-mode modules and read/edit entrypoints from pi-natives

- Removed `pi-natives` chunk language classifier modules and all core chunk subsystems (kind, state, render, edit, resolve).
- Removed chunk-mode CLI/read/edit entrypoints, including `read` command and chunk mode registration/prompt tooling.
- Removed chunk selectors from `read` and `grep` tools, switching behavior to raw/L-range handling.
- Fixed poll wait parsing to keep defaulting to `30s` when the provided value is empty.

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

@@ -1,33 +0,0 @@
-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"));
-	});
-});