resource opener in config

+ implement config field `pdf_opener` for setting app to open PDFs/Epubs
+ implement config field `url_opener` for setting app to open URLs/DOIs
+ function to select fallback if no field is provided in config

1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index 725cd8e..47d57de 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,8 @@ POSITIONAL ARGS:
 FLAGS:
     -h, --help          Show this help and exit
     -v, --version       Show the version and exit
+    -c, --config-file   Path to config file for current session
+                        Takes precedence over standard config file 
     --light-terminal    Enable color mode for light terminal background
 
 ```