docs/manual: add custom keybinds section; minor wording tweaks

Co-Authored-by: horriblename <badnam3o.0@gmail.com>

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Idefa75ca9a92f89d008977a88066515d6a6a6964

docs/manual/configuring/keybinds.md

@@ -0,0 +1,38 @@
+# Custom keymaps {#ch-keymaps}
+
+Some plugin modules provide keymap options for your convenience. If a keymap is
+not provided by such module options, you may easily register your own custom
+keymaps via {option}`vim.keymaps`.
+
+```nix
+{
+  config.vim.keymaps = [
+    {
+      key = "<leader>m";
+      mode = "n";
+      silent = true;
+      action = ":make<CR>";
+    }
+    {
+      key = "<leader>l";
+      mode = ["n" "x"];
+      silent = true;
+      action = "<cmd>cnext<CR>";
+    }
+    {
+      key = "<leader>k";
+      mode = ["n" "x"];
+      
+      # While `lua` is `true`, `action` is expected to be
+      # a valid Lua expression.
+      lua = true;
+      action = ''
+        function()
+          require('foo').do_thing()
+          print('did thing')
+        end
+      '';
+    }
+  ];
+}
+```

docs/manual/configuring/overriding-plugins.md

@@ -14,11 +14,12 @@ vim.pluginOverrides = {
     rev = "";
     hash = "";
   };
+ 
  # It's also possible to use a flake input
  lazydev-nvim = inputs.lazydev-nvim;
  # Or a local path 
  lazydev-nvim = ./lazydev;
- # Or a npins pin... etc
+ # Or a npins pin nvfetcher source, etc.
 };
 ```