feat: add getTsMorphProject method

[Julien-R44]

PR is targetting #4412 and depends on https://github.com/adonisjs/assembler/pull/74

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Two things :

• add a getTsMorphProject() method on Codemods class. so that users can make their own codemods as explained in https://github.com/adonisjs/assembler/pull/74

  export async function configure(command: Configure) {
    const codemods = await command.createCodemods()
   const project = await codemods.getTsMorphProject()
  
  // can do whatever I want
   project.getSourceFileOrThrow('file.ts').addImportDeclaration({
     moduleSpecifier: 'ts-morph',
     namedImports: ['Project'],
   })
  }
  

• Refactoring the Codemods class so as to create just one instance of ts-morph and CodeTransformer. Creating an instance of ts-morph is a costly operation