feat: create flowcharts from a generic element using elbow arrows (#8329)

Co-authored-by: Mark Tolmacs <mark@lazycat.hu>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/locales/en.json

@@ -316,6 +316,7 @@
     "placeImage": "Click to place the image, or click and drag to set its size manually",
     "publishLibrary": "Publish your own library",
     "bindTextToElement": "Press enter to add text",
+    "createFlowchart": "Hold CtrlOrCmd and Arrow key to create a flowchart",
     "deepBoxSelect": "Hold CtrlOrCmd to deep select, and to prevent dragging",
     "eraserRevert": "Hold Alt to revert the elements marked for deletion",
     "firefox_clipboard_write": "This feature can likely be enabled by setting the \"dom.events.asyncClipboard.clipboardItem\" flag to \"true\". To change the browser flags in Firefox, visit the \"about:config\" page.",
@@ -366,6 +367,8 @@
     "click": "click",
     "deepSelect": "Deep select",
     "deepBoxSelect": "Deep select within box, and prevent dragging",
+    "createFlowchart": "Create a flowchart from a generic element",
+    "navigateFlowchart": "Navigate a flowchart",
     "curvedArrow": "Curved arrow",
     "curvedLine": "Curved line",
     "documentation": "Documentation",