file_previewer stale for directories after creating/moving files

[jamestrew]

Description

This is primarily a downstream telescope-file-browser issue.

Currently, from what I can tell, the file_previewer previewer caches buffer numbers in a local variable called bufname_table inside telescope.previewers.buffer_previewer.new_buffer_previewer.
This applies mostly to directories when using telescope-file-browser but when files are created/moved into a directory while the picker is active and the preview for that directory path is already cached, the previewer shows the cached preview which is now stale.

I'm wondering if it's feasible to expose bufname_table as part of the previewer's state (picker.previewer.state.bufname_table) so that we can manipulate this cache downstream on certain actions.

Open for discussion and willing to submit a PR.

Neovim version

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Operating system and version

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Telescope version / branch / rev

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checkhealth telescope

telescope: require("telescope.health").check()

Checking for required plugins ~
- OK plenary installed.
- OK nvim-treesitter installed.

Checking external dependencies ~
- OK rg: found ripgrep 13.0.0
- OK fd: found fd 8.6.0

Steps to reproduce

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Expected behavior

No response

Actual behavior

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Minimal config

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