scripts: Rename reader, Fix listing, Add sxhkd bind

Renamed general reader script to `wallr`, indicating wallabag as the
underlying reader input.
Fixed listing of unread articles which showed read articles before.

Added shortcuts to sxhkd's academia mode:
the existing `r` invokes wallr with unread article display;
newly added `shift+r` invokes wallr with all articles displayed.

scripts/.local/bin/wallr

@@ -1,5 +1,5 @@
 #!/usr/bin/env sh
-# Read
+# Read wallabag articles from the commandline
 # extended version of one-liner script to read wallabag articles in shell
 # "wallabag list -n | head -n-1 | tail -n+2 | fzf | sed -e 's/^ //' |  cut -f1 -d' ' | xargs wallabag show | ifne less"
 
@@ -102,7 +102,7 @@ while getopts "h?qnorse" opt; do
     # v)  verbose=1
     # ;;
   n)
-    WALLR_FILTER="new"
+    WALLR_FILTER="unread"
     ;;
   r)
     WALLR_FILTER="read"

sxhkd/.config/sxhkd/sxhkdrc

@@ -84,6 +84,6 @@ alt + a : shift + {F1,F2}
   rofi-bib-due -p{1,3}
 alt + a : F3
   rofi-bib-due
-
-alt + a : r
-  alacritty --class floating,floating -e reader -n
+# read wallabag articles from the cmdline
+alt + a : {r, shift+r}
+  alacritty --class floating,floating -e wallr {-n,_}