sioyek: Add mappings for page/highlight movement

Added hjkl mappings to scroll within pages. Added movement
between highlights with `]h/[h`, although I am not sure it
works in both directions with these mappings.

writing/.config/sioyek/keys_user.config

@@ -1,4 +1,7 @@
 noop <C-w>
+noop q
+close_window q
+
 open_document_embedded o
 
 toggle_custom_color <C-r>
@@ -11,8 +14,12 @@ screen_down <C-d>
 previous_page <C-b>
 next_page <C-f>
 
-next_state L
-prev_state H
+next_state {
+prev_state }
+move_down j
+move_up k
+move_left l
+move_right h
 
 fit_to_page_width S
 fit_to_page_width_smart s
@@ -23,8 +30,12 @@ embed_annotations <C-s>
 
 toggle_statusbar <C-n>
 
-keyboard_select;add_highlight_with_current_type V
-
 regex_search /
 copy y
 rotate_clockwise R
+
+keyboard_select;add_highlight_with_current_type V
+add_highlight H
+
+goto_prev_highlight [h
+goto_next_highlight ]h