Allow buffer search in project search (#23819)

Closes #13437
Closes #19993

Release Notes:

- Allow searching within the results of a project search
- vim: Fix `/`/`?`, `n`/`N`, `gn`/`gN`,`*`/`#` in project search results

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Co-authored-by: Nico <nico.lehmann@gmail.com>

assets/keymaps/default-linux.json

@@ -136,7 +136,7 @@
       "ctrl-k z": "editor::ToggleSoftWrap",
       "find": "buffer_search::Deploy",
       "ctrl-f": "buffer_search::Deploy",
-      "ctrl-h": ["buffer_search::Deploy", { "replace_enabled": true }],
+      "ctrl-h": "buffer_search::DeployReplace",
       // "cmd-e": ["buffer_search::Deploy", { "focus": false }],
       "ctrl->": "assistant::QuoteSelection",
       "ctrl-<": "assistant::InsertIntoEditor",