fix: ACNA-1683 - dotFiles copied not renamed

[amulyakashyap09]

ACNA-1683 | dotFiles copied not renamed

Description

The files [_dot.env, _dot.gitignore] are copied into the project on create/init where they get renamed to [.env, .gitignore] but the original files are still present, so the user has to delete the _dot versions.

Expected Behaviour

Files are renamed on create/init

Actual Behaviour

Files are duplicated, and renamed, so there are 2 versions
Reproduce Scenario (including but not limited to)
aio app init

Fixes #184

Related Issue

• dotFiles copied not renamed #184
• https://jira.corp.adobe.com/browse/ACNA-1683

Motivation and Context

It leaves unused files on the user's disk. Need to remove it.

How Has This Been Tested?

• Code has been tested on local machine
• Unit test case has been added for the same

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #195 (ea4914c) into master (423c3c4) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #195   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          392       393    +1     
  Branches        44        44           
=========================================
+ Hits           392       393    +1     

Impacted Files	Coverage Δ
generators/base-app/index.js	100.00% <100.00%> (ø)

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[purplecabbage]

This looks good, but I think it is really just a problem with the regex here not excluding our _ prefixed files.
// copy everything that does not start with an _
https://github.com/adobe/generator-aio-app/blob/master/generators/base-app/index.js#L50