Add YankEndOfLine action (#39143)

Since 2021 Neovim remaps Y to $y (1). DO the same in zed through a new action `YankToEndOfLine`. 

1: https://github.com/neovim/neovim/pull/13268

Release Notes:

- Added vim::YankToEndOfLine action which copies from the cursor to the end of the line excluding the newline. We bind it to Y by default in the vim keymap.

assets/keymaps/vim.json

@@ -240,6 +240,7 @@
       "delete": "vim::DeleteRight",
       "g shift-j": "vim::JoinLinesNoWhitespace",
       "y": "vim::PushYank",
+      "shift-y": "vim::YankToEndOfLine",
       "x": "vim::DeleteRight",
       "shift-x": "vim::DeleteLeft",
       "ctrl-a": "vim::Increment",
@@ -392,7 +393,7 @@
       "escape": "editor::Cancel",
       "shift-d": "vim::DeleteToEndOfLine",
       "shift-j": "vim::JoinLines",
-      "shift-y": "vim::YankLine",
+      "shift-y": "vim::YankToEndOfLine",
       "shift-i": "vim::InsertFirstNonWhitespace",
       "shift-a": "vim::InsertEndOfLine",
       "o": "vim::InsertLineBelow",