Added validation for project id and project name - #8057

$ firebase init

     ######## #### ########  ######## ########     ###     ######  ########
     ##        ##  ##     ## ##       ##     ##  ##   ##  ##       ##
     ######    ##  ########  ######   ########  #########  ######  ######
     ##        ##  ##    ##  ##       ##     ## ##     ##       ## ##
     ##       #### ##     ## ######## ########  ##     ##  ######  ########

You're about to initialize a Firebase project in this directory:

  /Users/PATH/firebase-tools/test-apps/validate-project-id

? Which Firebase features do you want to set up for this directory? Press Space to select features, then Enter to confirm your choices. Data Connect: Set up a Firebase
 Data Connect service

=== Project Setup

First, let's associate this project directory with a Firebase project.
You can create multiple project aliases by running firebase use --add, 
but for now we'll just set up a default project.

? Please select an option: Create a new project
i  If you want to create a project in a Google Cloud organization or folder, please use "firebase projects:create" instead, and return to this command when you've created the project.
? Please specify a unique project id (warning: cannot be modified afterward) [6-30 characters]:
 abcde
>> Project ID must be at least 6 characters long

$ firebase init

     ######## #### ########  ######## ########     ###     ######  ########
     ##        ##  ##     ## ##       ##     ##  ##   ##  ##       ##
     ######    ##  ########  ######   ########  #########  ######  ######
     ##        ##  ##    ##  ##       ##     ## ##     ##       ## ##
     ##       #### ##     ## ######## ########  ##     ##  ######  ########

You're about to initialize a Firebase project in this directory:

  /Users/alejandromarco/Desktop/firebase-tools/test-apps/validate-project-id

? Which Firebase features do you want to set up for this directory? Press Space to select features, then Enter to confirm your choices. Data Connect: Set up a Firebase
 Data Connect service

=== Project Setup

First, let's associate this project directory with a Firebase project.
You can create multiple project aliases by running firebase use --add, 
but for now we'll just set up a default project.

? Please select an option: Create a new project
i  If you want to create a project in a Google Cloud organization or folder, please use "firebase projects:create" instead, and return to this command when you've created the project.
? Please specify a unique project id (warning: cannot be modified afterward) [6-30 characters]:
 asfasf
? What would you like to call your project? (defaults to your project ID) asf
>> Project name must be at least 4 characters long