v7.5.8

feat: add config system, Spanish locale support, malware check toggle

- Bump ver 7.5.7 -> 7.5.8, rc release-1 -> pre_release-1
- Add config system: def(), load_config(), base_config template
- Add SHOW_COLORS, MAX_LOG_SIZE, ENABLE_LOGGING, ALWAYS_USE_NOCONFIRM,
  AUTO_SNAPSHOT_ON_UPDATE, NETWORK_TESTING, DEFAULT_BACKEND, MALWARE_CHECK
- Add --edit-config action with auto editor detection (EDITOR, nano, vi, vim, micro)
- Add DEFAULT_BACKEND support in detback()
- Add MALWARE_CHECK config toggle for install malware check
- Add ALWAYS_USE_NOCONFIRM: appends --noconfirm to back_flags post-action
- Add --malware-check alias to aur_scanner action
- Add Spanish locale (lang_mod_es.sh) to load_lang() and install.sh
- Move extra_files/ -> components/ (aur_tag.sh, infected_packages.txt, base_config)
- Update PKGBUILD paths to components/
- Fix README: remove sudo from install.sh invocation
- Fix README: fix doctor table alignment, remove 'check' alias from --check-updates
- Add README entry for --aur-check
- Rename dpver() -> display_version() in -v|--version flag
- Add ping_cmd=1 flag for --ping action
- Compact log_rotate; detback; load_lang onto single line
- Reorder execution variables block