[Feature]: Tree-shaped output for explain query plan

Describe the new feature

Currently DB Browser outputs the results of explain query plan the same way it outputs everything else - a table with rows:

This is not particularly easy to read, especially as query plans get more complex. A tree-shaped output would make things much easier to reason about and share. A plain text tree would be easy to create from the information above:

QUERY PLAN
|--CO-ROUTINE 2
|  |--CO-ROUTINE 4
|  |  |--CO-ROUTINE 1
|  |  |  |--SCAN TABLE Foo AS b
|  |  |  |--SEARCH TABLE Bar AS o USING INDEX sqlite_autoindex_Objects_1 (Baz=?)
|  |  |  `--USE TEMP B-TREE FOR GROUP BY
|  |  |--SCAN SUBQUERY 1 AS x
|  |  `--USE TEMP B-TREE FOR ORDER BY
|  `--SCAN SUBQUERY 4
`--SCAN SUBQUERY 2 AS y

Does this feature exist in another product or project? Please provide a link

Probably there is something that already outputs this format, but I'm not sure. The idea is from https://stackoverflow.com/a/71412757.

Do you have a screenshot? Please add screenshots to help explain your idea.

No response

The issue names no source files, tests, or entry points. Start by locating the existing handling of EXPLAIN QUERY PLAN in DB Browser and trace how its rows are rendered; done means the same plan is presented as a readable text tree with nested parent and child rows.