Add "Copy current path" command palette action

[elviskahoro]

Closes #13149. Extends #13145 — adds the command-palette half of #8974.

What

Adds a "Copy current path" entry to the command palette that copies a path based on the focused pane, so the path can be copied without right-clicking and whether or not the file viewer is open:

• File viewer focused (FilePane → FileNotebookView) → copies the open file's display_path() (works for local and remote/SSH).
• Terminal / block focused → copies the current session's working directory (pwd).

This complements the right-click "Copy file path" item added to the file viewer in #13145.

How

• app/src/workspace/action.rs — new WorkspaceAction::CopyCurrentPath (added to the should_save_app_state_on_action => false list, since copying a path doesn't mutate app state).
• app/src/pane_group/mod.rs — PaneGroup::path_from_focused_pane, mirroring the existing selected_text_from_focused_pane sibling. Resolves a focused FilePane → file display_path(), otherwise focused_session_view().pwd() (falling back to display_working_directory, matching the existing tab "Copy working directory" item). Placed here so no local_fs cfg-gating is needed (FilePane is unconditionally available in this module).
• app/src/workspace/mod.rs — registers the always-available workspace:copy_current_path binding (palette label "Copy current path", id!("Workspace") predicate). No-op when nothing resolves.
• app/src/workspace/view.rs — Workspace::handle_action arm that writes the resolved path to the clipboard.
• crates/integration/... — integration test test_copy_current_path_copies_terminal_pwd (cd into a known dir, run the palette action, assert the clipboard equals the focused terminal's pwd), registered in the three usual places.

Scope: the rendered file viewer (FilePane) is covered; the code editor pane (CodePane) is intentionally out of scope.

Testing

• cargo check -p warp --lib → passes, no new warnings.
• cargo check -p integration --all-targets → passes (new test compiles and is registered).
• rustfmt --check on all touched files → clean.
• The integration test compiles and is wired up but was not executed here — Warp's UI integration tests need a real display. The file-viewer branch isn't exercised end-to-end, but it shares the same dispatch path as the tested terminal case and reuses the path() / display_path() accessors already unit-tested in Add "Copy file path" to file viewer pane right-click menu #13145.

[cla-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have the users @elviskahoro on file. In order for us to review and merge your code, each contributor must visit https://cla.warp.dev to read and agree to our CLA. Once you have done so, please comment @cla-bot check to trigger another check.

[oz-for-oss]

@elviskahoro

Every PR must be linked to a same-repo issue before Oz can review it.

Next step: open or find a same-repo issue describing this change, then link it to this PR by adding Closes #123 to the PR description (or using the "Development" sidebar on GitHub). A maintainer will mark the issue ready-to-implement when it is ready. Once it is marked, comment /oz-review to re-trigger review.

See the contribution guidelines for the full readiness model.

Powered by Oz

[oz-for-oss]

@elviskahoro

Every PR must be linked to a same-repo issue before Oz can review it.

Next step: open or find a same-repo issue describing this change, then link it to this PR by adding Closes #123 to the PR description (or using the "Development" sidebar on GitHub). A maintainer will mark the issue ready-to-implement when it is ready. Once it is marked, comment /oz-review to re-trigger review.

See the contribution guidelines for the full readiness model.

Powered by Oz

[elviskahoro]

@oz-agent This PR closes #13143

[elviskahoro]

@bholmesdev I did the CLA check! lmk if this needs feature flag