docs(readme): document anaconda integration and fws tooling comprehensive updates

Update README to reflect completed Anaconda 45 integration on Arch Linux, replacing Calamares. Document:

- Desktop choices (GNOME, KDE Plasma, XFCE, Hyprland, i3) with VR compatibility matrix
- Installation flow: Anaconda hub with FWS spokes, LiveOS payload, recap page before write
- fws-* tooling ecosystem: fws-hello, fws-update, fws-keys, fws-powermenu, fws-about, fws-vr-setup, fws-proton-ge, fws-recovery
- Hyprland & i3 visual parity: Catppuccin Mocha theme, waybar/polybar, wofi/rofi, custom SDDM theme
- Boot sequence: menu entries (normal, safe graphics, recovery, speech) → Openbox live → Anaconda → recap → installation
- Build process: incremental AUR + local PKGBUILD compilation (anaconda stack)
- Expanded troubleshooting: VM rendering issues, SteamVR, Bluetooth, recovery mode, BIOS/UEFI boot
- Log locations for live and post-install debugging
- Clarified file locations: kickstart, spokes, configs, tools, branding

TRADEMARKS.md

@@ -60,7 +60,7 @@ Le système live héritait de l'`os-release` du paquet `filesystem` d'Arch et
 
 > **Red Hat®** et **Fedora®** sont des marques déposées de **Red Hat, Inc.**
 > L'installateur **Anaconda** est développé par Red Hat. FWS distribue une
-> **version MODIFIÉE** d'Anaconda (portée sur Arch, payload `liveimg`), **non
+> **version MODIFIÉE** d'Anaconda (portée sur Arch, payload LiveOS), **non
 > officielle**, **non fournie ni approuvée** par Red Hat ou le projet Fedora.
 > *« This product includes a modified version of Anaconda. Red Hat and Fedora
 > are trademarks of Red Hat, Inc. This is an unofficial build, not provided or