[FEATURE] Support spinnerVerbs in VSCode Extension

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Feature Request

The spinnerVerbs setting in ~/.claude/settings.json works correctly
in the CLI (terminal), but is not applied in the VSCode extension.

Current Behavior

• CLI: spinnerVerbs is respected and custom verbs are displayed.
• VSCode Extension: spinnerVerbs is ignored; default verbs are shown.

Expected Behavior

The VSCode extension should support spinnerVerbs the same way the CLI does.

Settings Example

{
  "spinnerVerbs": {
    "mode": "replace",
    "verbs": ["custom message 1", "custom message 2"]
  }
}


### Proposed Solution

Support spinnerVerbs in VSCode Extension

### Alternative Solutions

_No response_

### Priority

Critical - Blocking my work

### Feature Category

CLI commands and flags

### Use Case Example

_No response_

### Additional Context

_No response_