Font selection for text layers (#585)

* Add font dropdown

* Add fonts

* Font tool options

* Fix tests

* Replace http with https

* Add variant selection

* Do not embed default font

* Use proxied font list API

* Change default font to Merriweather

* Remove outdated comment

* Specify font once & load font into foreignobject

* Fix tests

* Rename variant to font_style

* Change TextAreaInput to use FieldInput (WIP, breaks functionality)

* Fix textarea functionality

* Fix types

* Add weight name mapping

* Change labeling of "Italic"

* Remove commented HTML node

* Rename font "name" to "font_family" and "file" "font_file"

* Fix errors

* Fix fmt

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/frontend/frontend_message.rs

@@ -24,8 +24,10 @@ pub enum FrontendMessage {
 	DisplayRemoveEditableTextbox,
 
 	// Trigger prefix: cause a browser API to do something
+	TriggerDefaultFontLoad,
 	TriggerFileDownload { document: String, name: String },
 	TriggerFileUpload,
+	TriggerFontLoad { font: String },
 	TriggerIndexedDbRemoveDocument { document_id: u64 },
 	TriggerIndexedDbWriteDocument { document: String, details: FrontendDocumentDetails, version: String },
 	TriggerTextCommit,