Update app dev tutorial to include Go and Java (backport #5038)

[mergify]

This change uses (linked) tabs to display code snippets and language-specific commands for the user's desired programming language.

In order to use the sphinx-tabs extension, the version of Python used to build the docs had to be updated. Since the n42org/tox Docker image used had a very old Python version baked in, and there were no more recent versions available, the make docs target now uses the official Python image. In addition to providing a much more current Python environment, this image natively supports arm64 in addition to amd64, allowing docs to be built on Apple Silicon Macs.

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This is an automatic backport of pull request #5038 done by Mergify.

[mergify]

Cherry-pick of a1b3773 has failed:

On branch mergify/bp/release-2.5/pr-5038
Your branch is up to date with 'origin/release-2.5'.

You are currently cherry-picking commit a1b3773a2.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/source/conf.py
	modified:   docs/source/write_first_app.rst
	modified:   tox.ini

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   Makefile
	both modified:   docs/requirements.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally