IntersectMBO Page Updates

### Problem statement

Have to scroll to find website, Should we link to page of devex? Or directly to Intersect? Can we change the design of that page as standalone?

Unrelated: Meetup Button, are we able to change the text? Maybe Dev-Ex Sessions? Or should that display y'alls Calendar links?

### Proposed solution

Any relevant revision or change to the suggestions above.

### Scope and impact

Incremental improvements.

### Checks

- [x] I searched existing issues and discussions
- [x] This is a feature/enhancement request (not a question or doc issue)

No files, tests, or entry points are named. Start by reviewing the current IntersectMBO page and its website and Meetup controls, then clarify the intended destination, page design, button text, and calendar behavior; done means the maintainers agree on and implement a specific set of page revisions.

索引モデルが issue の本文から書いたものです。