Update Community CLI Flow types (#49866)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/49866

Scope down type definitions to the subset of CLI we are currently explicitly referencing. Rename/bump to `19.x`.

Related to:
- https://github.com/facebook/react-native/pull/45380
- https://github.com/react-native-community/cli/pull/2584
- (others)

Changelog: [Internal]

Reviewed By: rshest

Differential Revision: D70699083

fbshipit-source-id: 43af1b529d9b95f3d8ba955588af6a09367cdcea

flow-typed/npm/@react-native-community/cli-server-api_v19.x.x.js

@@ -42,6 +42,4 @@ declare module '@react-native-community/cli-server-api' {
     },
     ...
   };
-
-  declare export const indexPageMiddleware: NextHandleFunction;
 }

flow-typed/npm/@react-native-community/cli-tools_v12.x.x.js

@@ -1,29 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow strict
- * @format
- * @oncall react_native
- */
-
-declare module '@react-native-community/cli-tools' {
-  declare export class CLIError extends Error {
-    constructor(msg: string, originalError?: Error | mixed | string): this;
-  }
-
-  declare export const logger: $ReadOnly<{
-    debug: (...message: Array<string>) => void,
-    error: (...message: Array<string>) => void,
-    log: (...message: Array<string>) => void,
-    info: (...message: Array<string>) => void,
-    warn: (...message: Array<string>) => void,
-    ...
-  }>;
-
-  declare export const version: $ReadOnly<{
-    logIfUpdateAvailable: (projectRoot: string) => Promise<void>,
-  }>;
-}

flow-typed/npm/@react-native-community/cli-types_v19.x.x.js

@@ -10,15 +10,15 @@
  */
 
 declare module '@react-native-community/cli-types' {
-  declare export type CommandFunction<Args = Object> = (
+  declare type CommandFunction<Args = Object> = (
     argv: Array<string>,
     ctx: Config,
     args: Args,
   ) => Promise<void> | void;
 
-  declare export type OptionValue = string | boolean | number;
+  declare type OptionValue = string | boolean | number;
 
-  declare export type CommandOption<T = (ctx: Config) => OptionValue> = {
+  declare type CommandOption<T = (ctx: Config) => OptionValue> = {
     name: string,
     description?: string,
     parse?: (val: string) => any,