A PDF table exporter

**What problem will this feature request solve?**
Some people have very big tables, and the only way they can export those now is downloading those to Excel (if they have a license), or CSV, but they lose a lot of formatting in the middle. What happens if they have a pivot table? they lose all the formatting and the beauty of our pivots

**Describe the solution you'd like.**
A feature that allows users to just export tables and pivot tables in PDF with pagination and landscape mode

**How does this feature request impact you?**
It will give all those paper printing lovers a really nice reason to keep using Metabase

**Additional information**
NA

No files, tests, or entry points are named in the issue. First map how table and pivot-table exports are currently handled, then define pagination, landscape mode, and formatting preservation as acceptance criteria for PDF output.

Written by the indexing model from the issue text.