ncurses: Add a Dilbert assistant

Drawn by myself.

README.asciidoc

@@ -976,7 +976,7 @@ Some options are built in Kakoune, and can be used to control it's behaviour:
    - `ncurses_status_on_top`: if `yes`, or `true` the status line will be placed
      at the top of the terminal rather than at the bottom.
    - `ncurses_assistant`: specify the nice assistant you get in info boxes, can
-      be 'clippy' (the default), 'cat' or 'none'
+      be 'clippy' (the default), 'cat', 'dilbert' or 'none'
    - `ncurses_enable_mouse`: boolean option that enables mouse support
    - `ncurses_change_colors`: boolean option that can disable color palette
      changing if the terminfo enables it but the terminal does not support it.

doc/manpages/options.asciidoc

@@ -153,7 +153,7 @@ Builtin options
 
 		*ncurses_assistant*:::
 			specify the nice assistant you get in info boxes,
-			can be *clippy* (the default), *cat* or *none*
+			can be *clippy* (the default), *cat*, *dilbert* or *none*
 
 		*ncurses_enable_mouse*:::
 			boolean option that enables mouse support

src/ncurses_ui.cc

@@ -51,6 +51,18 @@ static constexpr StringView assistant_clippy[] =
       " ╰───╯  ",
       "        " };
 
+static constexpr StringView assistant_dilbert[] =
+    { R"(  დოოოოოდ   )",
+      R"(  |     |   )",
+      R"(  |     |  ╭)",
+      R"(  |-ᱛ ᱛ-|  │)",
+      R"( Ͼ   ∪   Ͽ │)",
+      R"(  |     |  ╯)",
+      R"( ˏ`-.ŏ.-´ˎ  )",
+      R"(     @      )",
+      R"(      @     )",
+      R"(            )"};
+
 static void set_attribute(WINDOW* window, int attribute, bool on)
 {
     if (on)
@@ -1010,6 +1022,8 @@ void NCursesUI::set_ui_options(const Options& options)
             m_assistant = assistant_clippy;
         else if (it->value == "cat")
             m_assistant = assistant_cat;
+        else if (it->value == "dilbert")
+            m_assistant = assistant_dilbert;
         else if (it->value == "none" or it->value == "off")
             m_assistant = ConstArrayView<StringView>{};
     }