Implement the Text Tool and text layer MVP (#492)

* Add text tool

* Double click with the select tool to edit text

* Fix (I think?) transitioning to select tool

* Commit and abort text editing

* Transition to a contenteditable div and autosize

* Fix right click blocking

* Cleanup hints

* Ctrl + enter leaves text edit mode

* Render indervidual bounding boxes for text

* Re-format space indents

* Reflect font size in the textarea

* Fix change tool behaviour

* Remove starting text

* Populate the cache (caused doc load bug)

* Remove console log

* Chrome display the flashing text entry cursor

* Update overlay on input

* Cleanup input.ts

* Fix bounding boxes

* Apply review feedback

* Remove manual test

* Remove svg from gitignore

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

editor/src/frontend/frontend_message.rs

@@ -18,12 +18,15 @@ pub enum FrontendMessage {
 	DisplayDialogError { title: String, description: String },
 	DisplayDialogPanic { panic_info: String, title: String, description: String },
 	DisplayDocumentLayerTreeStructure { data_buffer: RawBuffer },
+	DisplayEditableTextbox { text: String, line_width: Option<f64>, font_size: f64 },
+	DisplayRemoveEditableTextbox,
 
 	// Trigger prefix: cause a browser API to do something
 	TriggerFileDownload { document: String, name: String },
 	TriggerFileUpload,
 	TriggerIndexedDbRemoveDocument { document_id: u64 },
 	TriggerIndexedDbWriteDocument { document: String, details: FrontendDocumentDetails, version: String },
+	TriggerTextCommit,
 
 	// Update prefix: give the frontend a new value or state for it to use
 	UpdateActiveDocument { document_id: u64 },