kakoune: set up package with plugins

packages/common/nki-kakoune/autoload/markdown.kak

@@ -0,0 +1,29 @@
+hook global WinSetOption filetype=(markdown) %{
+    map buffer normal <c-b> ": enter-user-mode markdown-menu<ret>"
+}
+
+# A menu for common markdown actions
+declare-user-mode markdown-menu
+
+map -docstring "Toggle the checkboxes on the same line" global markdown-menu t ": markdown-toggle-checkbox<ret>"
+
+define-command -hidden markdown-toggle-checkbox %{
+    try %{
+        execute-keys -draft "xs^\s*- \[( |x)\]<ret>h: markdown-toggle-checkbox-selections<ret>"
+    }
+}
+
+define-command -hidden markdown-toggle-checkbox-selections %{
+    try %{
+        execute-keys -draft -itersel ": markdown-toggle-checkbox-one<ret>"
+    }
+}
+
+define-command -hidden markdown-toggle-checkbox-one %{
+    try %{
+        execute-keys -draft "sx<ret>r "
+    } catch %{
+        execute-keys -draft "s <ret>rx"
+    }
+}
+