Reorganize Resources, top menu, and ohw23 & ohw22 menus

[emiliom]

Substantial reorganization of pages and menus.

• Resources is now found in the top bar menu
• OHW22 was removed from the top bar menu
• Some content previously under the resources folder was moved and duplicated to both ohw23 and ohw22: the logistics and projects folders
• Copied tutorials and tutorials-index folders from ohw22 to ohw23. So, right now ohw23 tutorials is a stub, pointing to ohw22 tutorials
• Created stub ohw23 schedule page. Currently it's just a copy of the old ohw22 page

A bunch of event-specific content will need to be updated. Let's at least add warnings (admonitions) where they're found, while we do the updates.

@abkfenris :

• The ohw22 menu is now broken. I tried different things and couldn't get it to work. Could you look into it?
• I haven't figured out how you link the ohw-tutorials repo into the tutorials folder. So, that part will be broken for ohw23

This PR is definitely not intended to be merged as is. Let's use it to discuss the reorganization and suggest changes large or small.

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[emiliom]

Once we've merged this PR, we can tackle PR #260

[abkfenris]

For the OHW22 nav, I think that Sphinx only wants to render toctrees that are part of the global toctree hiearchy, so adding the OHW22 index explicitly to another tree should do it.

# on about/pasthackweeks.md ?

```{toctree}
:maxdepth: 1

../ohw22/index.md
```

• https://sphinx-doc-zh.readthedocs.io/en/latest/markup/toctree.html
• https://sphinx-doc-zh.readthedocs.io/en/latest/config.html#confval-master_doc

The tutorials are linked via a git submodule which is defined here, but there is an incantation for adding them that I don't remember at the moment, but here is the PR when I set things up that way.

There are a whole bunch of other errors that I think correspond to changed pages that are probably worth going through.

[emiliom]

Thanks @abkfenris ! I've pushed several commits that:

• Added ohw22/index.md to the pasthackweeks.md toctree. That fixed the ohw22 section menu issue!
• Did a bunch of other fixes to ensure toctrees are being generated as expected for ohw22 and ohw23
• Removed logistics and projects folders from resources, now that they've been moved to the event folders
• Moved tutorials/getting_started.md from resources to the individual event folders, renamed as tutorials_getting_started.md

The "tutorials-index" git submodule stuff for ohw23 is still pending. @abkfenris I'll let you take care of that.

How do things look now? FYI Old content is still largely not updated, with minor exceptions. I also for the most part haven't added any new warnings ("admonitions") about old content in individual pages. Once the page organization stabilizes and this PR is merged, maybe @alisonpchase and @btupper can tackle that?

[abkfenris]

There are a few pages that have been moved from resources to event specific pages and duplicated. I think we can keep them in resources and use admonitions (and maybe tabs) to call out any event specifics.

[abkfenris]

It feels like most of getting help and the projects info right now are more general and could live in resources.

[emiliom]

The mix of general and event-specific content seemed more even in getting help and projects info. It's fair to say that both follow a template where some specific information (Slack channel names, dates, brief descriptions, etc) would be customized in each event. For the getting help page, the text is the same except for a bunch of Slack channel names that are spread throughout the page. I think that makes the use of admonitions too crowded / bloated.

Anyways, I'll take another look.

[emiliom]

• I've moved the general project content to resources/projects.md, and the event-specific project content to ohw23/projects/index.md and ohw22/projects/index.md. Those two event pages now use an include block to load resources/projects.md. The general project page is also available from the Resources menu.
• Let's leave the logistics pages in the event directories for now, duplication and all

There are still some errors that could be fixed w/o too much trouble. Maybe later!

[emiliom]

• Added prominent admonition in OHW23 front page about some ohw23 content being currently old
• Purged links to ohw22 tutorials, and left in place only the getting started page for now, until ohw23 tutorials land

[emiliom]

The ohw23 tutorials submodule linkage will be done later, in a separate PR. See #263