Enable changing of the default image used at the center of the wallpaper

While running the script causes a password prompt for gnome-keyring to show, might show other prompts for other keyring backends.

Depending on the number of packages installed and screen resolution the end of the list might get cut-off. noticed it first on low-res monitor.

imagemagick does not scale text to best-fit when using pango, using pango is required for coloring outdated packages.
To solve this I re-write this part using a web-based solution using chromium screenshot option.
I would have preferred using Firefox but it does not allow for it while having another open session which is a limitation which does not fit this tool as it will mostly run in the background while the user might have a running Firefox session.

This should be done by generating a little gui for changing settings.
A shortcut could be created in xfce4 settings using a desktop entry as explained here and an example can be found here

allow picking font type used to render the wallpaper

Chromium v111 appears to have an issue when using the --headless and --window-size options and will always default to 800x600.
There is an open bug on the chromium bug tracker - link

Due to unexpected errors the script might get stuck indefinitely.
Its good to add a watchdog to make sure pacman wont stay stuck while updating.

current workaround is to terminate the headless chromium process menually.

Sometimes the script fails with the following error
/opt/fox-neat-wallpaper/fox-neat-wallpaper.sh: line 158: -1: substring expression < 0

When this happens the cache stores in get_outdated_packages the following: ;

Should be caused by handling empty outdated list, when checkupdates response with 1.

Add support for a config file which enables to change some settings for the wallpaper.

There should be an option to create a system-wide config to effect all users and a user specific config file.
I would assume its best to use /etc/app-name for system-wide config and ~/.app-name for the user config file.
file should have all supported settings commented out which should act as a documentation.

Add the ability to change colors:

• background color
• up-to-date package names
• outdated package names

• Create a list of potential back-ends
• Add detection for each back-end
• Add code for using available back-end
• share the love with all users who have chromium installed <3

A fix could be to check which is the primary monitor used and making the query to the detected primary monitor.

Some data could be cached to improve performance, reduce resource, run time and put less stress on remote resources.
remove the waiting time and resource of waiting for query from pacman and checkupdates tool.

• get_outdated_packages for improved time, resource usage and remote resouce stress
• get_current_packages for improved time and resource usage cache