zk: Split nnn quicknote and nni idea alias

nni Quickly lets me dump an idea, while nnn quickly lets me create a new
note in the notes inbox.

writing/zk/config/sh/alias.d/zk.sh

@@ -26,7 +26,7 @@ if [ -n "${WIKIROOT}" ]; then
     nn() { # 'new note'
         _zk_wiki new "$@"
     }
-    nni() { # 'new note inbox'
+    nnn() { # 'new quicknote'
         _zk_wiki new -t "${*}" inbox
     }
     nnl() { # 'new note log'
@@ -35,4 +35,7 @@ if [ -n "${WIKIROOT}" ]; then
     nnd() { # 'new note draft'
         _zk_wiki draft "$@"
     }
+    nni() { # 'new note idea'
+        _zk_wiki edit -n 1 -m idea dump
+    }
 fi