Release of version 0.12.0

[khebhut[bot]]

Hey, @pacospace!

Opening this PR to create a release in a backwards compatible manner.

Closes: #557

Changelog:
### Features
* Feature/inputs-runtime-environment
* Add missing dependency
* Add table for UI parameters description
* Fix command name
* Fix development section
* Adjust order
* Make pre-commit happy
* Add UI doc section
* Adjust links
* Add horus cli readme section
* Add magic commands section
* Improve README
* Fix check on kernelspec for command
* Modified required verison of jupyterlab
* Add link for overlays tutorial
### Improvements
* Add debug to docs for UI, CLI and magic commands
* Add debug to magic commands
* Add debug to CLI
* Add debug to UI

[sesheta]

[APPROVALNOTIFIER] This PR is APPROVED

Approval requirements bypassed by manually added approval.

This pull-request has been approved by: sefkhet-abwy[bot]

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/thoth-station/jupyterlab-requirements/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[sesheta]

[APPROVALNOTIFIER] This PR is APPROVED

Approval requirements bypassed by manually added approval.

This pull-request has been approved by: sefkhet-abwy[bot]

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/thoth-station/jupyterlab-requirements/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[sesheta]

[APPROVALNOTIFIER] This PR is APPROVED

Approval requirements bypassed by manually added approval.

This pull-request has been approved by: sefkhet-abwy[bot]

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/thoth-station/jupyterlab-requirements/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[sesheta]

Hi @khebhut[bot]. Thanks for your PR.

I'm waiting for a thoth-station member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.