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/grid/tiles.sass

@@ -0,0 +1,36 @@
+@import "../utilities/mixins"
+
+$tile-spacing: 0.75rem !default
+
+.tile
+  align-items: stretch
+  display: block
+  flex-basis: 0
+  flex-grow: 1
+  flex-shrink: 1
+  min-height: min-content
+  // Modifiers
+  &.is-ancestor
+    margin-left: $tile-spacing * -1
+    margin-right: $tile-spacing * -1
+    margin-top: $tile-spacing * -1
+    &:last-child
+      margin-bottom: $tile-spacing * -1
+    &:not(:last-child)
+      margin-bottom: $tile-spacing
+  &.is-child
+    margin: 0 !important
+  &.is-parent
+    padding: $tile-spacing
+  &.is-vertical
+    flex-direction: column
+    & > .tile.is-child:not(:last-child)
+      margin-bottom: 1.5rem !important
+  // Responsiveness
+  +tablet
+    &:not(.is-child)
+      display: flex
+    @for $i from 1 through 12
+      &.is-#{$i}
+        flex: none
+        width: (divide($i, 12)) * 100%