Keymap/extra options (#1384)

* keymaps: fix unable to set noremap = false

Currently setting `vim.keymaps.*.noremap = false` has no effect.
Given that noremap is set by default, the only way to undo it is
to use `remap = true`. This commit adds `remap` as an internal option,
and derives its final value as the inverse of noremap.
This way, setting `noremap` to `false` now behaves as expected.

See https://neovim.io/doc/user/lua-guide.html#_creating-mappings

* keymaps/config: fix formatting

merge unnecessarily split attrset

* keymaps/options: remove unnecessary option

+ tweak related release notes entry

modules/wrapper/rc/config.nix

@@ -39,6 +39,7 @@ in {
 
     getOpts = keymap: {
       inherit (keymap) desc silent nowait script expr unique noremap;
+      remap = !keymap.noremap;
     };
 
     toLuaKeymap = bind: "vim.keymap.set(${toLuaObject bind.mode}, ${toLuaObject bind.key}, ${toLuaObject (getAction bind)}, ${toLuaObject (getOpts bind)})";