feat(coding-agent): added advisor CLI flag for runtime advisor enabling

- Added a new `--advisor` flag to argument parsing and launch flag definitions.
- Applied the parsed `advisor` flag as a runtime-only override of `advisor.enabled` during startup.
- Updated advisor-related docs and added parseArgs tests for `--advisor` behavior and position handling.

packages/coding-agent/src/cli/args.ts

@@ -33,6 +33,7 @@ export interface Args {
 	appendSystemPrompt?: string;
 	thinking?: Effort;
 	hideThinking?: boolean;
+	advisor?: boolean;
 	continue?: boolean;
 	resume?: string | true;
 	help?: boolean;
@@ -194,6 +195,8 @@ export function parseArgs(inputArgs: string[], extensionFlags?: Map<string, { ty
 			result.noPty = true;
 		} else if (arg === "--hide-thinking") {
 			result.hideThinking = true;
+		} else if (arg === "--advisor") {
+			result.advisor = true;
 		} else if (arg === "--print" || arg === "-p") {
 			result.print = true;
 		} else if (arg === "--no-extensions") {

packages/coding-agent/src/cli/flag-tables.ts

@@ -260,6 +260,7 @@ export const VALUELESS_FLAGS: ReadonlySet<string> = new Set([
 	"--no-lsp",
 	"--no-pty",
 	"--hide-thinking",
+	"--advisor",
 	"--print",
 	"--no-extensions",
 	"--no-skills",