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/utilities/controls.sass

@@ -0,0 +1,49 @@
+@import "derived-variables"
+
+$control-radius: $radius !default
+$control-radius-small: $radius-small !default
+
+$control-border-width: 1px !default
+
+$control-height: 2.5em !default
+$control-line-height: 1.5 !default
+
+$control-padding-vertical: calc(0.5em - #{$control-border-width}) !default
+$control-padding-horizontal: calc(0.75em - #{$control-border-width}) !default
+
+=control
+  -moz-appearance: none
+  -webkit-appearance: none
+  align-items: center
+  border: $control-border-width solid transparent
+  border-radius: $control-radius
+  box-shadow: none
+  display: inline-flex
+  font-size: $size-normal
+  height: $control-height
+  justify-content: flex-start
+  line-height: $control-line-height
+  padding-bottom: $control-padding-vertical
+  padding-left: $control-padding-horizontal
+  padding-right: $control-padding-horizontal
+  padding-top: $control-padding-vertical
+  position: relative
+  vertical-align: top
+  // States
+  &:focus,
+  &.is-focused,
+  &:active,
+  &.is-active
+    outline: none
+  &[disabled],
+  fieldset[disabled] &
+    cursor: not-allowed
+
+// The controls sizes use mixins so they can be used at different breakpoints
+=control-small
+  border-radius: $control-radius-small
+  font-size: $size-small
+=control-medium
+  font-size: $size-medium
+=control-large
+  font-size: $size-large