Add option to either use system clipboard or vim clipboard (#7936)

Release Notes:

- vim: Added a setting to control default clipboard behaviour. `{"vim":
{"use_system_clipboard": "never"}}` disables writing to the clipboard.
`"on_yank"` writes to the system clipboard only on yank, and `"always"`
preserves the current behavior. ([#4390
](https://github.com/zed-industries/zed/issues/4390))

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/vim/Cargo.toml

@@ -39,6 +39,7 @@ tokio = { version = "1.15", "optional" = true }
 ui.workspace = true
 workspace.workspace = true
 zed_actions.workspace = true
+schemars.workspace = true
 
 [dev-dependencies]
 editor = { workspace = true, features = ["test-support"] }