Update to yeoman-generator@5

[mshima]

Overview of the feature request

yeoman-environment@3/yeoman-generator@5 brings many improvements:

• improves multiples generators integration with unique generator by namespace or namespace/argument.
• parallel commit workflow (conflict prompts won't block other files to be prettified and checked for conflicts).
• integrated npm install that executes if package.json has changed and committed.

Tasks:

• 1. rename packageJson used to create a package.json template for dependencies versions to dependabotPackageJson or something else.
• 2. create a bootstrap generator for required tasks for every generator like prettier and basic config like user entity.
  • replace registerTransformStream with our custom commit workflow for integrated commit/conflicts with prettier.
• 3. remove uses of install action.
• 4. replace our custom generator singleton with upstream unique option.
• 5. use this.packageJson storage

Motivation for or Use Case

• Reduce our generator-base class.
• Improved commit/conflicts.
• User experience.

Related issues or PR

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