vim: Fix key navigation on folded buffer headers (#25944)

Closes #24243

Release Notes:

- vim: Fix j/k on folded multibuffer headers

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Co-authored-by: João Marcos <marcospb19@hotmail.com>

crates/vim/Cargo.toml

@@ -55,6 +55,7 @@ git_ui.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
 indoc.workspace = true
 language = { workspace = true, features = ["test-support"] }
+project = { workspace = true, features = ["test-support"] }
 lsp = { workspace = true, features = ["test-support"] }
 parking_lot.workspace = true
 project_panel.workspace = true