Add all workflow files for first release

[kabilar]

• Add Dev Containers
  • Tutorial Dev Container runs the tutorial jupyter notebook locally or on GitHub Codespaces.
  • Local Test Dev Container runs the pytests locally whereby workflow-optogenetics and element-optogenetics are located in the same parent directory.
• Add Element activation commands in workflow_optogenetics
• Add standard repo files: readme, changelog, issue_templates, .github/workflows, etc.
• Add pytests
• Note, element-optogenetics==0.1.1 is not released to PyPI due to a .github/workflow dependency on this workflow, so you will need to install from source if running the changes in this pull request.

[kushalbakshi]

A small suggestion for the notebook, if we want to read from dj_local_conf, we should add the following code before importing datajoint and the workflow:

import os

if os.path.basename(os.getcwd()) == "notebooks":
    os.chdir("..")

[kabilar]

A small suggestion for the notebook, if we want to read from dj_local_conf, we should add the following code before importing datajoint and the workflow:

import os

if os.path.basename(os.getcwd()) == "notebooks":
    os.chdir("..")

Thanks @kushalbakshi. Since we are migrating to using Dev Containers and in order to keep the tutorials as streamlined as possible, how about we do the following?

1. Keep the current configuration with the DataJoint environment variables.
2. Update the User Guide with instructions on how to use the dj_local_conf.

[kushalbakshi]

Thanks @kushalbakshi. Since we are migrating to using Dev Containers and in order to keep the tutorials as streamlined as possible, how about we do the following?

1. Keep the current configuration with the [DataJoint environment variables](https://github.com/kabilar/workflow-optogenetics/blob/8dbee85916e4ff92c8aba0d37416eeae0a0d4b04/.devcontainer/Dockerfile#L36-L40C27).

2. Update the [User Guide](https://datajoint.com/docs/elements/user-guide/) with instructions on how to use the `dj_local_conf`.

Yes, that's a good idea. Thank you!