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/document/layer_panel.rs

@@ -97,6 +97,7 @@ pub struct LayerPanelEntry {
 pub enum LayerDataTypeDiscriminant {
 	Folder,
 	Shape,
+	Text,
 }
 
 impl fmt::Display for LayerDataTypeDiscriminant {
@@ -104,6 +105,7 @@ impl fmt::Display for LayerDataTypeDiscriminant {
 		let name = match self {
 			LayerDataTypeDiscriminant::Folder => "Folder",
 			LayerDataTypeDiscriminant::Shape => "Shape",
+			LayerDataTypeDiscriminant::Text => "Text",
 		};
 
 		formatter.write_str(name)
@@ -117,6 +119,7 @@ impl From<&LayerDataType> for LayerDataTypeDiscriminant {
 		match data {
 			Folder(_) => LayerDataTypeDiscriminant::Folder,
 			Shape(_) => LayerDataTypeDiscriminant::Shape,
+			Text(_) => LayerDataTypeDiscriminant::Text,
 		}
 	}
 }