fix claude-code incorrect shift+enter keybinding

See: https://github.com/anthropics/claude-code/issues/14793

alacritty-claude.toml

@@ -1,5 +0,0 @@
-# Claude added the following but chars line breaks config
-[[keyboard.bindings]]
-key = "Return"
-mods = "Shift"
-chars = "\x1b\r"

src/base.toml

@@ -36,6 +36,13 @@ style = "Semibold"
 x = -1
 y = 0
 
+
+# claude-code shift+enter support
+[[keyboard.bindings]]
+key = "Return"
+mods = "Shift"
+chars = "\u001B\r"
+
 [[keyboard.bindings]]
 action = "Paste"
 key = "V"