Separate the Text node's generated glyphs into separate vector table rows (#2821)

* Separate glyphs into Vector data rows

* Fix `String Length` node

- Properly count characters with
`str.chars().count()` instead of bytes `str.len()`
- Change `String Length` node's output to `u32`

* Apply transform on instance instead of applying it when drawing the glyph

* Add checkbox to enable/disable per-glyph instances

* Tooltips

---------

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

editor/src/messages/portfolio/document_migration.rs

@@ -635,7 +635,7 @@ fn migrate_node(node_id: &NodeId, node: &DocumentNode, network_path: &[NodeId],
 	}
 
 	// Upgrade Text node to include line height and character spacing, which were previously hardcoded to 1, from https://github.com/GraphiteEditor/Graphite/pull/2016
-	if reference == "Text" && inputs_count != 9 {
+	if reference == "Text" && inputs_count != 10 {
 		let mut template = resolve_document_node_type(reference)?.default_node_template();
 		document.network_interface.replace_implementation(node_id, network_path, &mut template);
 		let old_inputs = document.network_interface.replace_inputs(node_id, network_path, &mut template)?;
@@ -689,6 +689,15 @@ fn migrate_node(node_id: &NodeId, node: &DocumentNode, network_path: &[NodeId],
 			},
 			network_path,
 		);
+		document.network_interface.set_input(
+			&InputConnector::node(*node_id, 9),
+			if inputs_count >= 10 {
+				old_inputs[9].clone()
+			} else {
+				NodeInput::value(TaggedValue::Bool(false), false)
+			},
+			network_path,
+		);
 	}
 
 	// Upgrade Sine, Cosine, and Tangent nodes to include a boolean input for whether the output should be in radians, which was previously the only option but is now not the default