feat(anaconda): integrate anaconda installer with openbox and add licensing documentation

Add Anaconda installer integration to FWS live environment:

- Implement Anaconda launcher in .xinitrc with comprehensive error logging and debugging support
- Add anaconda and anaconda-widgets packages to baseline and releng ISO configs
- Fix anaconda-widgets PKGBUILD: replace gladeui with glib2-devel, disable Glade module
- Update anaconda PKGBUILD with improved dependencies and build configuration
- Add python-blivet PKGBUILD with detailed dependency documentation

Enhance documentation and branding:

- Expand AUTHORS.rst to clarify FWS vs archiso authorship and licensing
- Update CONTRIBUTING.rst with inbound=outbound licensing policy and DCO requirements
- Extend README.md with comprehensive legal basis table and licensing checklist
- Remove Arch Linux references from MOTD and update to FWS GitHub project page
- Fix fastfetch.sh to avoid read-only variable conflict in zsh
- Add xterm to packages for installer debugging

All changes maintain GPL-3.0-or-later compliance and improve GPL offer transparency.

AUTHORS.rst

@@ -1,7 +1,22 @@
-===============
+=======
+Authors
+=======
+
+FWS
+===
+
+FWS is a fork of archiso. The FWS-specific work (build chain, installer
+integration, package recipes under ``pkgbuilds/``) is © the FWS contributors,
+distributed under ``GPL-3.0-or-later`` (see ``COPYRIGHT.md``).
+
+* FWS contributors <suzuku295@gmail.com>
+
 Archiso Authors
 ===============
 
+The build system (``mkarchiso``, profiles, man pages) derives from archiso and
+retains the authorship of its original contributors:
+
 * 2hexed <2hexed@protonmail.com>
 * Aaron Griffin <aaron@archlinux.org>
 * Adam Purkrt <adam@purkrt.net>