Add visualization overlays to G/R/S (#2195)

* Make HintInfo label use Cow<'static, str> instead of String

Fixes https://discord.com/channels/731730685944922173/881073965047636018/931942323644928040

tmp, will amend later

* Replaces dynamic hint used by transform layer with overlays

* Adds a scaling factor accounting for document and viewport scales

Also moves whole code to single unit

* Make overlays relative to viewport rather than document

* Add visualization overlays to G/R/S in the Select tool

* Prevents quick measurements from showing up when resizing bounds

Fixes https://discord.com/channels/731730685944922173/881073965047636018/1328282633456713762

* Add local axes which activates on double constraints.

* Handle the bounding box of a collection of layers as select tool does

* Replaced hard coded transparent color and removed debug! which slipped in

* Make rotation axes start along local axis

* Fix typed distance being in doc space and negatives

* Fix missing undo transactions for some actions

* Code review

---------

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

editor/src/consts.rs

@@ -53,6 +53,10 @@ pub const PIVOT_CROSSHAIR_THICKNESS: f64 = 1.;
 pub const PIVOT_CROSSHAIR_LENGTH: f64 = 9.;
 pub const PIVOT_DIAMETER: f64 = 5.;
 
+// Transform overlay
+pub const ANGLE_MEASURE_RADIUS_FACTOR: f64 = 0.04;
+pub const ARC_MEASURE_RADIUS_FACTOR_RANGE: (f64, f64) = (0.05, 0.15);
+
 // Transformation cage
 pub const BOUNDS_SELECT_THRESHOLD: f64 = 10.;
 pub const BOUNDS_ROTATE_THRESHOLD: f64 = 20.;
@@ -88,6 +92,7 @@ pub const COLOR_OVERLAY_RED: &str = "#ef5454";
 pub const COLOR_OVERLAY_GRAY: &str = "#cccccc";
 pub const COLOR_OVERLAY_WHITE: &str = "#ffffff";
 pub const COLOR_OVERLAY_SNAP_BACKGROUND: &str = "#000000cc";
+pub const COLOR_OVERLAY_TRANSPARENT: &str = "#ffffff00";
 
 // Document
 pub const DEFAULT_DOCUMENT_NAME: &str = "Untitled Document";