Fix template not used for help command

[dev-drprasad]

What does this change

Fix custom templates not used for commands and little refactor

Ouput of porter help:

I am porter 👩🏽‍✈️, the friendly neighborhood CNAB authoring tool

Usage:
  porter [command]

Examples:
  porter create
  porter build
  porter install
  porter uninstall

Resources:
  bundles     Bundle commands
  credentials Credentials commands
  instances   Bundle Instance commands
  mixins      Mixin commands

Aliased Commands:
  archive     Archive a bundle
  build       Build a bundle
  create      Create a bundle
  explain     Explain a bundle
  install     Install a new instance of a bundle
  invoke      Invoke a custom action on a bundle instance
  list        list instances of installed bundles
  publish     Publish a bundle
  show        Show an instance of a bundle
  uninstall   Uninstall a bundle instance
  upgrade     Upgrade a bundle instance

Meta Commands:
  docs        Generate markdown docs
  schema      Print the JSON schema for the Porter manifest
  version     Print the application version

Flags:
      --debug   Enable debug logging
  -h, --help    help for porter

Use "porter [command] --help" for more information about a command.

What issue does it fix

Closes #656

Notes for the reviewer

Renamed helptext directory to templates. It made sense to me

Checklist

• Unit Tests
• Documentation
  • Documentation Not Impacted

[carolynvs]

This is what was missing and causing things to not work properly for binaries not build on dev machines. Thanks for figuring that out! 👍

It can be hard to tell because packr will fallback to the filesystem when the data isn't found in the binary. Because this line was missing, nothing was being built into the binary for the help text. But it was working on dev machines because the files were present locally. 😆

The other changes in the file aren't necessary and should be reverted.

[dev-drprasad]

The other changes are intentional.
I thought directory name: templates makes sense than helptext because in future we may need to add other templates. So, i refactored that logic

If i am wrong/misunderstood , i can revert if you want

[carolynvs]

Our preference for pull requests, is it limit them to a single task. In this case the issue is to fix the help text and since the refactoring wasn't necessary for the fix, we prefer to not include it in the same PR.

Later, if we had an issue where we needed to add more templates to cmd/porter, that would be the time to refactor. Right now we don't have anything like that on the backlog though.

[carolynvs]

Thanks for the fix!