Add 3 point arc (#5722)

* bare minimum

* start of segment util added

* remove redundant handle

* some probably buggy handling of arc handles, can fix later

* probably bug implementation of update args, but data flow through is mostly there can fix bugs after

* fix update for arc

* fix math for center handle

* fix up length indicator

* tweak math

* stub out xState logic for arc

* more progress on adding point and click, implemented more of sketchLineHelper for arc

* small unrelated tweak

* fix up draft arc bugs

* fix arc last click

* fix draft segment animation and add comment

* add draft point snapping for arcs

* add helper stuff to arc

* clone arc point and click as base for arc-three-point

* rust change for arc three point

* can draw three point arc

* make arcTo editable

* can add new three point arc, so long as it continues existing profile

* get overlays working

* make snap to for continuing profile work for three point arcs

* add draft animation

* tangent issue fix

* action rename

* tmp test fix up

* fix silly bug

* fix couple problems causing tests to fail

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* fix up

* add delet segment test for new segments

* update docs

* draft segments should look right

* add test for dragging new segment handles

* arc tools can be chained now

* make three point arc can start a new profile (not only extend existing paths)

* add test for equiping and unequiping the tool plus drawing with it

* fix console noise

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* clean up

* update rust/docs

* put toolbar mode check into fixture

* do thing for lee

* use TEST_COLORSs

* fix colors

* don't await file write

* remove commented code

* remove unneeded template strings

* power to **2

* remove magic numbers

* more string templates

* some odd bits of clean up

* arc should be enable in dev

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* add new simulation test

* fix test code from kwark migration

* issues Frank found

* fix deleting half complete ark

* fix

* small fix on dele index

* tsc post main merge

* fix up snaping to profile start

* add cross hari for three point arc

* block snapping if it's the only segment

* add tests for canceling arcTo halfway through

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/clientSideScene/ClientSideSceneComp.tsx

@@ -147,7 +147,8 @@ export const ClientSideScene = ({
       state.matches({ Sketch: 'Tangential arc to' }) ||
       state.matches({ Sketch: 'Rectangle tool' }) ||
       state.matches({ Sketch: 'Circle tool' }) ||
-      state.matches({ Sketch: 'Circle three point tool' })
+      state.matches({ Sketch: 'Circle three point tool' }) ||
+      state.matches({ Sketch: 'Arc three point tool' })
     ) {
       cursor = 'crosshair'
     } else {
@@ -490,14 +491,19 @@ const SegmentMenu = ({
               verticalPosition === 'top' ? 'bottom-full' : 'top-full'
             } z-10 w-36 flex flex-col gap-1 divide-y divide-chalkboard-20 dark:divide-chalkboard-70 align-stretch px-0 py-1 bg-chalkboard-10 dark:bg-chalkboard-100 rounded-sm shadow-lg border border-solid border-chalkboard-20/50 dark:border-chalkboard-80/50`}
           >
-            <button
-              className="!border-transparent rounded-sm text-left p-1 text-nowrap"
-              onClick={() => {
-                send({ type: 'Constrain remove constraints', data: pathToNode })
-              }}
-            >
-              Remove constraints
-            </button>
+            {stdLibFnName !== 'arcTo' && (
+              <button
+                className="!border-transparent rounded-sm text-left p-1 text-nowrap"
+                onClick={() => {
+                  send({
+                    type: 'Constrain remove constraints',
+                    data: pathToNode,
+                  })
+                }}
+              >
+                Remove constraints
+              </button>
+            )}
             <button
               className="!border-transparent rounded-sm text-left p-1 text-nowrap"
               title={