.tanzuignore supports regex

[heyjcollins]

Description of problem

Extend the work done in #33 to support regex.

PM to complete

Proposed solution

<Please describe your proposed solution, preferably in the following style:>

Given <Some Condition>
When <Something Happens>
Then <This other thing should happen?>

Example

<Code snippets that illustrate the when/then blocks>

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.

[scothis]

Please don't define a new syntax for the .tanzuignore file, use the existing syntax that is common with .gitignore, .dockerignore etc. If a user has an existing ignore file that is appropriate, they could use that file by --ignore-file .dockerignore while the default value for --ignore-file would be .tanzuignore

[heyjcollins]

Going to close this issue as we haven't received any votes or feedback requesting this feature be added.
Feel free to reopen with comment if this is an enhancement you're interested in.