Compiles css framework from sass (#1956)

* Compiles css framework from sass

* Adds watch commands

* Copies existing css to sass file

* Moves sass out of static path

* Removes global linter

I wasn't sure how to customize this, and it's not providing a lot of
additional value on top of the domain-specific linters

* Reverts invalid change to dockerfile

* Changes stylelint path

* Remove unused bulma files

* Properly minifies generated css

* Fixes regression in thread display

* rgba function only works with percents for whatever reason

* Hush stylelint

* Removes trailing zeros

* Compile sass in Django

Co-authored-by: Joachim <joachim.robert@protonmail.com>

* Python formatting

* Updates linter

* Updates commands

* Adds css-config file

Co-authored-by: Joachim <joachim.robert@protonmail.com>

* Stylelint fix

* Removes unused compiled bulma files

Co-authored-by: Joachim <joachim.robert@protonmail.com>

bookwyrm/static/css/vendor/bulma/sass/elements/container.sass

@@ -0,0 +1,29 @@
+@import "../utilities/mixins"
+
+$container-offset: (2 * $gap) !default
+$container-max-width: $fullhd !default
+
+.container
+  flex-grow: 1
+  margin: 0 auto
+  position: relative
+  width: auto
+  &.is-fluid
+    max-width: none !important
+    padding-left: $gap
+    padding-right: $gap
+    width: 100%
+  +desktop
+    max-width: $desktop - $container-offset
+  +until-widescreen
+    &.is-widescreen:not(.is-max-desktop)
+      max-width: min($widescreen, $container-max-width) - $container-offset
+  +until-fullhd
+    &.is-fullhd:not(.is-max-desktop):not(.is-max-widescreen)
+      max-width: min($fullhd, $container-max-width) - $container-offset
+  +widescreen
+    &:not(.is-max-desktop)
+      max-width: min($widescreen, $container-max-width) - $container-offset
+  +fullhd
+    &:not(.is-max-desktop):not(.is-max-widescreen)
+      max-width: min($fullhd, $container-max-width) - $container-offset