Various changes around developer experience

[NeilHanlon]

• add .envrc to download latest version of hugo on macos and Linux
• add list.html layout to support table-of-contents like view without manually updating announcements.md
• put RSS link into header on Section pages
• only build RSS for Section pages
• remove deprecated taxonomyGroup keyword

[gmkurtzer]

$ hugo server
ERROR 2023/11/08 13:05:57 You have the value 'taxonomy' in the disabledKinds list. In Hugo 0.73.0 we fixed these to be what most people expect (taxonomy and term).
But this also means that your site configuration may not do what you expect. If it is correct, you can suppress this message by following the instructions below.
If you feel that this should not be logged as an ERROR, you can ignore it by adding this to your site config:
ignoreErrors = ["error-disable-taxonomy"]
Start building sites … 
hugo v0.110.0+extended darwin/arm64 BuildDate=unknown
Error: Error building site: logged 1 error(s)
Built in 159 ms

$ hugo version
hugo v0.110.0+extended darwin/arm64 BuildDate=unknown

[NeilHanlon]

yeah, that is.. frustrating. lol

Do we know why we have taxonomy disabled, btw? or, put another way, do we want taxonomies anywhere on the site?

https://gohugo.io/content-management/taxonomies/

[NeilHanlon]

cc @brianclemens - this it the PR I was talking about

[brianclemens]

I suppose enabling taxonomies would make sense if we put a ton more content here but I think we're keeping the main site as a simple landing page / blog. And it will likely be replaced by a site using whatever the js framework-of-the-day is, anyway...

[NeilHanlon]

:|

well.

i'll rebase this and at least get the current workflow working a bit better.