Add Helm Chart examples

[lucacome]

Proposed changes

Problem: We don't have an easy way to deploy NGF for common use cases

Solution: Create an examples directory with common use cases for deploying Helm. As an added bonus we can generate manifests automatically from the examples.

Closes #1834

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

NONE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.74%. Comparing base (ff5faa9) to head (6e37b93).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2292   +/-   ##
=======================================
  Coverage   87.74%   87.74%           
=======================================
  Files          96       96           
  Lines        6813     6813           
  Branches       50       50           
=======================================
  Hits         5978     5978           
  Misses        778      778           
  Partials       57       57           

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[ADubhlaoich]

Documentation changes LGTM.