Update bundle related methods

[NucciTheBoss]

Description

This pull request aims to fix the issues that I identified in issue #98. Here is the summary of modifications that I made below:

• Modify build_bundle method to use charmcraft pack rather than juju-bundle. It now returns a Path object that points to where the built bundle zip archive is stored.
• Added the build_bundles method to build bundles asynchronously .
• Modified deploy_bundle to use juju deploy ... rather than juju-bundle.
• Updated the regex in render_bundle to also accept the .tmpl file extension. I also enhanced the robustness of the expression. The original regex would match inputs such as xyamlij2, Byaml, etc since "." means any character. I modified it so that the regex would only accept the "." character.

Related issues

• Closes #98

Miscellaneous

I updated the .gitignore file to ignore the .idea directory. I made this modification since I use PyCharm. I also added a hashbang and copyright information to the top of plugin.py.

[NucciTheBoss]

Hi there @addyess - thank you for the initial round of reviews. I will work through them as I have the time :smile: Either way, we should get folks off of using juju-bundle to deploy bundles via pytest_operator. I will most likely get to it later this week or next depending on how the pulse lines up.

[addyess]

Hi there @addyess - thank you for the initial round of reviews. I will work through them as I have the time smile Either way, we should get folks off of using juju-bundle to deploy bundles via pytest_operator. I will most likely get to it later this week or next depending on how the pulse lines up.

Cool, i can agree with getting off juju-bundle. I dunno who it would break. Just wanna make sure it doesn't break me :D