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/src/utils/edit-mode.ts

@@ -1,13 +1,12 @@
 import { $env, $flag } from "@oh-my-pi/pi-utils";
 
-export type EditMode = "replace" | "patch" | "hashline" | "chunk" | "vim" | "apply_patch" | "atom";
+export type EditMode = "replace" | "patch" | "hashline" | "vim" | "apply_patch" | "atom";
 
 export const DEFAULT_EDIT_MODE: EditMode = "hashline";
 
 const EDIT_MODE_IDS = {
 	apply_patch: "apply_patch",
 	atom: "atom",
-	chunk: "chunk",
 	hashline: "hashline",
 	patch: "patch",
 	replace: "replace",

packages/coding-agent/src/utils/file-display-mode.ts

@@ -7,7 +7,6 @@ import { resolveEditMode } from "./edit-mode";
 export interface FileDisplayMode {
 	lineNumbers: boolean;
 	hashLines: boolean;
-	chunked: boolean;
 }
 
 /** Session-like object providing settings and tool availability for display mode resolution. */
@@ -33,10 +32,8 @@ export function resolveFileDisplayMode(session: FileDisplayModeSession, options?
 	const usesHashLineAnchors = editMode === "hashline" || editMode === "atom";
 	const raw = options?.raw === true;
 	const hashLines = !raw && hasEditTool && usesHashLineAnchors && settings.get("readHashLines") !== false;
-	const chunked = !raw && hasEditTool && editMode === "chunk";
 	return {
 		hashLines,
 		lineNumbers: !raw && (hashLines || settings.get("readLineNumbers") === true),
-		chunked,
 	};
 }