Move verbose into Config; drop resolveVerbose

Verbose was awkwardly a separate runKeeper argument with a separate
resolveVerbose helper, even though it's just another tunable on the
same precedence ladder as the numeric fields. This commit collapses it.

Changes:

- Config gains 'readonly verbose: boolean'. DEFAULT_CONFIG sets it to
  false.
- resolveConfig now returns the full Config including verbose. Verbose
  layers with the same 'first defined value wins' precedence as the
  numeric fields.
- resolveVerbose is gone.
- ParsedCliArgs.verbose becomes boolean | undefined: undefined when -V
  was not passed, true when it was. parseCliArgs maps accordingly.
  This lets the layered resolver treat verbose uniformly.
- runKeeper takes a single Config arg. The internal logger reads from
  config.verbose at the top of runKeeper.
- move.ts no longer plumbs verbose separately; the single resolved
  Config drives everything.
- README How-it-works and Files-table entries updated to match.

Behavior verified for all five verbose-precedence cases (no file/no
flag, no file/-V, file:true/no flag, file:false/-V, file:false/no
flag) and config-error scenarios remain intact.

README.md

@@ -166,13 +166,13 @@ modules:
 
 - `src/move.ts` is a thin entry point: parses args, dispatches `--help` /
   `--version`, loads the config file, resolves the layered runtime
-  config, and calls `runKeeper(config, verbose)`.
+  config, and calls `runKeeper(config)`.
 - `src/cli.ts` owns argument parsing, validation, and help/version output.
 - `src/configFile.ts` owns optional JSON config-file loading + strict
   schema validation.
-- `src/config.ts` exports the `Config` type, `DEFAULT_CONFIG`,
-  `defaultConfigPath`, and the layered `resolveConfig` / `resolveVerbose`
-  overlay functions.
+- `src/config.ts` exports the `Config` type (which carries every tunable
+  including `verbose`), `DEFAULT_CONFIG`, `defaultConfigPath`, and the
+  layered `resolveConfig` overlay function.
 - `src/keeper.ts` owns the synthetic-activity sweep and the idle-watch loop.
 
 Defaults live in `src/config.ts` as `DEFAULT_CONFIG`:
@@ -257,7 +257,7 @@ move --help
 | `scripts/dev-setup.sh` | Contributor bootstrap (verify Bun + `bun install`).                        |
 | `src/move.ts`       | CLI entry point: parses args, dispatches help/version, starts the loop.       |
 | `src/cli.ts`        | Argument parsing, validation, and help/version output.                        |
-| `src/config.ts`     | `Config` type, `DEFAULT_CONFIG`, `defaultConfigPath`, and the layered `resolveConfig` / `resolveVerbose` overlay. |
+| `src/config.ts`     | `Config` type (carries every tunable, including `verbose`), `DEFAULT_CONFIG`, `defaultConfigPath`, and the layered `resolveConfig` overlay. |
 | `src/configFile.ts` | Optional JSON config-file loader with strict schema validation.               |
 | `src/keeper.ts`     | Synthetic-activity sweep and idle-watch loop.                                 |
 | `package.json`      | Bun project manifest. Single runtime dep: `@nut-tree-fork/nut-js`.            |