PR from Fecony's contribution to ask for removing files

[davidverdu]

PR created on behalf of @fecony and related to this external PR #475

Check if project folder or resource already exist before generating new file. It will ask user if he wants to override existing file and continue or stop generating. If user agrees to override it file/project folder is removed. If declines then it will throw error for user to use different resource name. (See Images below)

Closes #305

Changes

• Checks if project or file already exist.
• export projectDir()
• Adds checkProjectAlreadyExists() to check if project already exists in current directory.
• Adds checkResourceExists() to check if resource already exists.
• Unit tests for checkProjectAlreadyExists() and checkResourceExists() methods
• Adds confirmPrompt() which is used by checkProjectAlreadyExists() and checkResourceExists() to reuse same code
• Adds filePath function which was used in single method, to get path where resource should be generated. Is used for generation and to check if resource exists
• Adds FileDir type for filePath method to pick only required params 'placementDir' | 'name' | 'extension'
• Adds getResourceType() to get resource name from path.

Checks

• Project Builds
• Project passes tests and checks
• Updated documentation accordingly

Additional information

Preview of CLI new messages