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>

node-graph/gcore/src/vector/vector_nodes.rs

@@ -2041,7 +2041,7 @@ fn point_inside(_: impl Ctx, source: VectorDataTable, point: DVec2) -> bool {
 
 #[node_macro::node(category("General"), path(graphene_core::vector))]
 async fn count_elements<I>(_: impl Ctx, #[implementations(GraphicGroupTable, VectorDataTable, RasterDataTable<CPU>, RasterDataTable<GPU>)] source: Instances<I>) -> u64 {
-	source.instance_iter().count() as u64
+	source.len() as u64
 }
 
 #[node_macro::node(category("Vector: Measure"), path(graphene_core::vector))]