Stop using backspace for delete

This broke when we reworked our keyboard actions setup. It's also not properly integrated with new keyboard parser. If we wanted to support special keys like `backspace` with our keyboard parser, we should define a VSCode command that sends a keyboard token to our parser, and map `backspace` to that

docs/user/experimental/keyboard/modal.md

@@ -29,18 +29,12 @@ Paste the following into your [VSCode `keybindings.json`](https://code.visualstu
         "key": "escape",
         "command": "cursorless.keyboard.escape",
         "when": "cursorless.keyboard.listening && editorTextFocus && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
-    },
-    {
-        "key": "backspace",
-        "command": "cursorless.keyboard.targeted.runActionOnTarget",
-        "args": "remove",
-        "when": "cursorless.keyboard.modal.mode && editorTextFocus"
     }
 ```
 
 Any keybindings that use modifier keys should go in `keybindings.json` as well, with a `"when": "cursorless.keyboard.modal.mode` clause.
 
-The above allows you to press `ctrl-c` to switch to Cursorless mode, `escape` to exit Cursorless mode, and `backspace` to issue the delete action while in Cursorless mode.
+The above allows you to press `ctrl-c` to switch to Cursorless mode and `escape` to exit Cursorless mode.
 
 If you're already in Cursorless mode, pressing `ctrl-c` again will target the current selection, which is useful if you have moved the cursor using your mouse while in Cursorless mode, and want to target your new cursor position.
 
@@ -86,7 +80,8 @@ To bind keys that do not have modifiers (eg just pressing `a`), add entries like
     "ac": "copyToClipboard",
     "ax": "cutToClipboard",
     "ap": "pasteFromClipboard",
-    "ad": "followLink"
+    "ad": "followLink",
+    "aw": "remove",
   },
   "cursorless.experimental.keyboard.modal.keybindings.color": {
     "d": "default",

packages/cursorless-vscode-e2e/src/suite/keyboard/basic.vscode.test.ts

@@ -31,7 +31,7 @@ const testCases: TestCase[] = [
     name: "every",
     initialContent: "a a\nb b\n",
     // change every token air
-    keySequence: ["da", "x", "st", "c"],
+    keySequence: ["da", "*", "st", "c"],
     finalContent: " \nb b\n",
   },
   {

packages/cursorless-vscode/src/keyboard/keyboard-config.fixture.json

@@ -20,24 +20,25 @@
   },
   "cursorless.experimental.keyboard.modal.keybindings.action": {
     "at": "setSelection",
-    "ah": { "actionId": "setSelectionBefore", "exitCursorlessMode": true },
-    "al": { "actionId": "setSelectionAfter", "exitCursorlessMode": true },
-    "aO": { "actionId": "editNewLineBefore", "exitCursorlessMode": true },
+    "ah": "setSelectionBefore",
+    "al": "setSelectionAfter",
+    "ai": { "actionId": "editNewLineBefore", "exitCursorlessMode": true },
     "ao": { "actionId": "editNewLineAfter", "exitCursorlessMode": true },
-    "k": "insertCopyBefore",
-    "j": "insertCopyAfter",
+    "ak": "insertCopyBefore",
+    "aj": "insertCopyAfter",
     "au": "replaceWithTarget",
     "am": "moveToTarget",
     "c": { "actionId": "clearAndSetSelection", "exitCursorlessMode": true },
     "as": "swapTargets",
     "af": "foldRegion",
-    "ak": "insertEmptyLineBefore",
-    "aj": "insertEmptyLineAfter",
-    "ai": "insertEmptyLinesAround",
+    "aI": "insertEmptyLineBefore",
+    "aO": "insertEmptyLineAfter",
+    "aU": "insertEmptyLinesAround",
     "ac": "copyToClipboard",
     "ax": "cutToClipboard",
     "ap": "pasteFromClipboard",
     "ad": "followLink",
+    "x": "remove",
     "aw": "wrap"
   },
   "cursorless.experimental.keyboard.modal.keybindings.color": {
@@ -66,7 +67,7 @@
   },
   "cursorless.experimental.keyboard.modal.keybindings.modifier": {
     "n": "nextPrev",
-    "x": "every"
+    "*": "every"
   },
   "cursorless.experimental.keyboard.modal.keybindings.vscodeCommand": {
     "va": "editor.action.addCommentLine",