Function resolveSelectionActionFromEvent

resolveSelectionActionFromEvent(
e: AcEdSelectionModifierState,
defaultAction?: AcEdSelectionAction,
): AcEdSelectionAction
Resolves the selection action implied by the current modifier-key state.

Precedence is evaluated in the following order:
1. Shift returns 'remove'.
2. Ctrl or Meta returns 'add'.
3. If no modifier is active, defaultAction is returned.
This lets different call sites share the same modifier semantics while still choosing their own non-modified default, such as 'replace' for generic selection flows or 'add' for pointer interactions that should preserve the existing selection set.
Parameters
- e: AcEdSelectionModifierState
  Modifier-key state captured from the triggering input event.
- defaultAction: AcEdSelectionAction = 'replace'
  Action to use when no supported modifier key is active. Defaults to 'replace'.
Returns AcEdSelectionAction
The normalized selection action to apply.
Example
```
resolveSelectionActionFromEvent(
  { shiftKey: false, ctrlKey: false, metaKey: false },
  'replace'
)
// => 'replace'
```
Example
```
resolveSelectionActionFromEvent({
  shiftKey: true,
  ctrlKey: false,
  metaKey: false
})
// => 'remove'
```
- Defined in packages/cad-simple-viewer/src/editor/view/AcEdSelectionAction.ts:85