Make builds of the editor and the website serve their own local fonts (#2186)

* WIP

* Done?

* Install fonts in CI

* Use absolute path so minified inlined CSS works

* Fix Bezier-rs demo fonts?

* Use opsz

* Revert removal of text balancer

* Pull in the text balancer from our static host

website/sass/layout/balance-text.scss

@@ -1,22 +0,0 @@
-// CSS component of the JS text balancer script.
-// This must be loaded as an inline stylesheet in the head of the
-// document to avoid the possibility of a visible layout shift.
-
-.balance-text {
-	visibility: hidden;
-}
-
-@media (scripting: none) {
-	.balance-text {
-		visibility: visible !important;
-	}
-}
-
-@supports (text-wrap: balance) {
-	.balance-text,
-	.balanced-text {
-		text-align: left;
-		text-wrap: balance;
-		visibility: visible;
-	}
-}