PR Summary

• Disable 'delta' enhancement in git configuration
  The setting enable_delta was changed from true to false, which means the 'delta' enhancement for displaying differences in the Git command-line interface will be turned off.

• Inclusion of 'difftastic' in Fish shell aliases
  Added a new tool called 'difftastic' as an alias in the Fish Shell. This means the user can now run 'difftastic' more easily directly from the shell.

• Updated 'difftastic' settings
  The tool 'difftastic' had its configuration adjusted to both activate it and change the visual appearance, setting the background color to light.

• Enabled 'subprocess' within git configuration
  The 'subprocess' setting was enabled in the git configuration. This will enable git to spawn external processes when needed.

• Enabled 'difftastic' as the default diff tool
  The diff.tool configuration was uncommented to use 'difftastic' as the default tool for viewing differences between code changes in git.

• Switched the 'pager' from 'delta' to 'less -FRX'
  The setting for 'pager' in the git configuration was changed from 'delta' to 'less -FRX'. This affects how content is displayed in the git command-line interface, providing a simpler, streamlined viewer.