To address the issue of merging or removing files in the OLD_FILES directory, follow these steps:

Merge .markdownlintrc:
- Compare /OLD_FILES/.markdownlintrc with the current .markdownlintrc file.
- Merge any unique or necessary rules from the old file into the current configuration.
Review and Merge Vim Plugins:
- Check the /OLD_FILES/old-settings/plugin directory for any plugins not currently in use.
- For each plugin, either integrate its settings into the current Vim configuration or remove it if it's no longer needed.
Filetype Plugin Settings:
- Review /OLD_FILES/old-settings/ftplugin for filetype-specific settings.
- Merge any useful settings into the current ftplugin directory or remove them if redundant.
Syntax Highlighting:
- Compare /OLD_FILES/old-settings/syntax/perl.vim with the current Perl syntax settings.
- Merge any additional syntax rules if necessary.
Compiler Settings:
- Review /OLD_FILES/old-settings/compiler/perl.vim for Perl compiler settings.
- Integrate any useful settings into the current compiler configuration.
Filetype Detection:
- Check /OLD_FILES/old-settings/ftdetect for filetype detection rules.
- Merge any necessary rules into the current ftdetect directory.
Tools Configuration:
- Compare /OLD_FILES/tools/.perlcriticrc and .perltidyrc with the current configurations.
- Merge any useful settings or remove the old files if they are redundant.
Remove Unnecessary Files:
- After merging, remove any files in OLD_FILES that are no longer needed.

Ensure to back up the current configuration before making any changes.

Either merge or remove files in OLD_FILES #4

Description