DWM-Titus: add install/uninstall flow, fixes, and lint/doc updates

[Abs313a]

Type of Change

• New feature
• Bug fix
• Documentation update
• Refactoring
• Security patch
• UI/UX improvement

Description

This PR improves the DWM-Titus workflow in Linutil by making install/uninstall safer, more predictable, and easier to recover from, while also updating user docs and cleaning lint warnings across the repo.

DWM-Titus script improvements

• Added an interactive menu to dwmtitus-setup.sh:
  • Install
  • Uninstall
  • Quit
• Refactored install flow into explicit functions (installDWM, uninstallDWM, post_install_fixups, prompt_reboot).

Post-install reliability fixes

• Ensures DWM session entry exists for display managers:
  • creates /usr/share/xsessions
  • copies dwm.desktop
  • sets proper permissions (644)
• Handles SDDM autologin configs more robustly:
  • detects autologin config files in /etc/sddm.conf.d
  • moves them out to /etc/sddm-disabled to prevent forced autologin
  • Fixes ownership of ~/.config/dwm-titus to the actual user to avoid runtime permission failures after install.
• Adds reboot prompt.

Package conflict handling (Arch)

• Avoids networkmanager vs networkmanager-iwd conflict:
  • if networkmanager-iwd is already installed, installs/uses that instead of networkmanager.

Uninstall behavior

• Added explicit uninstall path that removes:
  • DWM binary/man/session entry (via make uninstall + cleanup)
  • copied scripts and config artifacts created by DWM-Titus
  • local DWM-Titus repository and related config directory.

SSH script cleanup

• Fixed quoting/remote-command issues in core/tabs/utils/ssh.sh to satisfy shellcheck.
• Added targeted SC2029 suppression where client-side expansion for remote execution is intentional.
• No feature behavior change intended; this is a reliability/lint cleanup for the SSH helper paths.

Issues / other PRs related

Screenshots (if applicable)

[Abs313a]

$NM_PACKAGE kept + merged package additions