🍱 [amp-gpt:1.0] Bento tracking issue

### High-Level Requirements

_To be updated as information becomes available._

| Consideration | Ready When | Status |
| ----------------------- | ------------------------------------------ | ------- |
| Component Compatibility | Feature checklist is covered | 🚧 |
| Testing | Unit tests and pre-existing e2e tests pass | 🚧 |
| Internationalization | | ✖️ |
| Analytics | | ✖️ |
| Accessibility | Audit performed | ✖️ |
| Page Experience | Audit performed | ✖️ |
| Documentation | Written | 🚧 |
| Storybook | Samples written in Preact and AMP | 🚧 |

### Feature Checklist

_To be updated as information becomes available._

### Features
- [x] Fallback DIV
- [x] Intersection Observer
- [x] Loader Animation

### Existing attributes
- [x] `ad-unit-path`
- [x] `disable-initial-load`
- [x] `slot-targeting`
- [ ] `page-targeting`
- [x] `size`
- [x] `opt-div`

### Actions
- [ ] `setTarget`
- [ ] `setPageTarget`
- [ ] `getTarget`
- [ ] `getPageTarget`
- [ ] `clearTarget`
- [ ] `clearPageTarget`
- [ ] `display`
- [ ] `refresh`

### Events
_To be updated as information becomes available._

### Analytics Events
_To be updated as information becomes available._

### Migration Notes

Migration does not apply to this component.

### Open Tasks

_To be updated as information becomes available._

- [ ] Action Implementation
- [ ] Complete Storybook
- [ ] Cleanup, `lint`, `prettify`
- [ ] Code commenting

### Notifications

/cc @ampproject/wg-bento

Start by reviewing the high-level requirements and feature checklist in this issue, then identify the existing component entry point and related tests for the AMP feature. The issue names no source files or tests, so its scope needs clarification before work begins. Done would require the remaining attributes and actions, Storybook samples, tests, documentation, accessibility and page-experience audits, and cleanup tasks to be completed.

Written by the indexing model from the issue text.