feat: add border config for SSH and keymaps help window (#299)

* feat: add config for ssh window border

* chore: add documentation for ssh window border

* feat: add config for keymaps help window border

* chore: add documentatoin for keymaps help window border

lua/oil/config.lua

@@ -67,6 +67,10 @@ local default_config = {
     ["g."] = "actions.toggle_hidden",
     ["g\\"] = "actions.toggle_trash",
   },
+  -- Configuration for the floating keymaps help window
+  keymaps_help = {
+    border = "rounded",
+  },
   -- Set to false to disable all of the above keymaps
   use_default_keymaps = true,
   view_options = {
@@ -142,6 +146,10 @@ local default_config = {
       winblend = 0,
     },
   },
+  -- Configuration for the floating SSH window
+  ssh = {
+    border = "rounded",
+  },
 }
 
 -- The adapter API hasn't really stabilized yet. We're not ready to advertise or encourage people to