Simplify limits to remove Bundled and Unbound references

[irvinebroque]

So that people don't get mixed up, our docs are confusing right now

https://x.com/MicheleRivaCode/status/1846489096547713274

• [ ] Before merging this — Create separate section at bottom of limits docs that is specifically for Unbound and Bundled limits (so that there is context for few who are on these old plans, plus historical context on the page for people who know old limits, without distracting from the base case) @ToriLindsay