Reintroduce multi-point arrows and add migration for it (#635)

* Revert "Revert "Feature: Multi Point Arrows (#338)" (#634)"

This reverts commit 3d2e59bfed.

* Convert old arrow spec to new one

* Remove unnecessary failchecks and fix context transform issue in retina displays

* Remove old points failcheck from getArrowAbsoluteBounds

* Remove all failchecks for old arrow

* remove the rest of unnecessary checks

* Set default values for the arrow during import

* Add translations

* fix restore using unmigrated elements for state computation

* don't use width/height when migrating from new arrow spec

Co-authored-by: David Luzar <luzar.david@gmail.com>
Co-authored-by: Christopher Chedeau <vjeuxx@gmail.com>

public/locales/en/translation.json

@@ -0,0 +1,80 @@
+{
+  "labels": {
+    "paste": "Paste",
+    "selectAll": "Select All",
+    "copy": "Copy",
+    "bringForward": "Bring Forward",
+    "sendToBack": "Send To Back",
+    "bringToFront": "Bring To Front",
+    "sendBackward": "Send Backward",
+    "delete": "Delete",
+    "copyStyles": "Copy Styles",
+    "pasteStyles": "Paste Styles",
+    "stroke": "Stroke",
+    "background": "Background",
+    "fill": "Fill",
+    "strokeWidth": "Stroke Width",
+    "sloppiness": "Sloppiness",
+    "opacity": "Opacity",
+    "fontSize": "Font Size",
+    "fontFamily": "Font Family",
+    "onlySelected": "Only selected",
+    "withBackground": "With Background",
+    "handDrawn": "Hand-Drawn",
+    "normal": "Normal",
+    "code": "Code",
+    "small": "Small",
+    "medium": "Medium",
+    "large": "Large",
+    "veryLarge": "Very Large",
+    "solid": "Solid",
+    "hachure": "Hachure",
+    "crossHatch": "Cross-Hatch",
+    "thin": "Thin",
+    "bold": "Bold",
+    "extraBold": "Extra Bold",
+    "architect": "Architect",
+    "artist": "Artist",
+    "cartoonist": "Cartoonist",
+    "fileTitle": "File title",
+    "colorPicker": "Color picker",
+    "canvasBackground": "Canvas background",
+    "drawingCanvas": "Drawing Canvas"
+  },
+  "buttons": {
+    "clearReset": "Clear the canvas & reset background color",
+    "export": "Export",
+    "exportToPng": "Export to PNG",
+    "exportToSvg": "Export to SVG",
+    "copyToClipboard": "Copy to clipboard",
+    "save": "Save",
+    "load": "Load",
+    "getShareableLink": "Get shareable link",
+    "close": "Close",
+    "selectLanguage": "Select Language",
+    "previouslyLoadedScenes": "Previously loaded scenes"
+  },
+  "alerts": {
+    "clearReset": "This will clear the whole canvas. Are you sure?",
+    "couldNotCreateShareableLink": "Couldn't create shareable link.",
+    "importBackendFailed": "Importing from backend failed.",
+    "cannotExportEmptyCanvas": "Cannot export empty canvas.",
+    "couldNotCopyToClipboard": "Couldn't copy to clipboard. Try using Chrome browser.",
+    "copiedToClipboard": "Copied to clipboard: {{url}}"
+  },
+  "toolBar": {
+    "selection": "Selection",
+    "rectangle": "Rectangle",
+    "diamond": "Diamond",
+    "ellipse": "Ellipse",
+    "arrow": "Arrow",
+    "line": "Line",
+    "text": "Text",
+    "lock": "Keep selected tool active after drawing"
+  },
+  "headings": {
+    "canvasActions": "Canvas actions",
+    "selectedShapeActions": "Selected shape actions",
+    "shapes": "Shapes"
+  }
+}