How to propagate or inherit certain buckconfig settings in child cells?

I have a `.buckconfig` in the root of the project (that is, next to `.buckroot`) that looks like this:

```ini
[repositories]
root = .
third-party = third-party/

[project]
ignore = \
.jj, \
.git, \
.direnv, \
.watchman-cookie** \
work
```

To make some things easier to refer to, I gave several of the top-level directories in this project their own cells like `third-party//`, so they have their own `.buckconfig` that looks like this (under `third-party/.buckconfig`):

```ini
[repositories]
third-party = .
```

However, when I build something out of the `third-party//` cell, it does *not* inherit the top-level `project.ignore`:

```
$ buck2 build third-party//sqlite:shell
File changed: root//.watchman-cookie-GANON-19124-6468
File changed: third-party//sqlite/BUILD
File changed: root//.watchman-cookie-GANON-19124-6469
9 additional file change events
Build ID: 8430ac14-7f80-4e1c-9af9-7e1ff47a08e9
Network: Up: 0B Down: 0B
Jobs completed: 20. Time elapsed: 0.0s.
```

Notably, even though I ran the build from the root directory of the project (i.e. what you would call `root//`), it still used the `.buckconfig` file from the `third-party//` cell, so it didn't ignore the `.watchman-cookie` files and instead saw them as changed.

The only current solution I see is duplicating the `project.ignore` setting across the `.buckconfig` of every single cell, but obviously this is kind of unfortunate and easy to mess up. This is my complaint, and what I would like to avoid. So I'd like a way to propagate or inherit this setting to child cells.

To be fair, I understand why this is the case overall and as the default; certain properties should definitely *not* be inherited by default. But would it be possible for certain "special" cases like `project.ignore` to propagate downwards? That would be an immediate fix but it's possibly not the best. Or maybe this should be handled through PACKAGE files or something, somehow? Should there be a new `project.global_ignore`? Or maybe there should be a new a `[root]` section that can only be specified in the top-level root `.buckconfig` file? I don't really know, but I'd like to just specify this setting once.