Initial commit: NexusOS project + desktop theme baseline

Captures the known-good state after theme consolidation and
consistency reconciliation:
- NexusOS GTK/xfwm4/icon theme assets (assets/themes, management/Mint-Y-Nexus)
- Tightened right-click menus, visible separators, no menu icons
- assets/themes/install-theme.sh: idempotent restore of all wiring
  (symlinks, xfconf xsettings+xfwm4, GTK 3/4 settings.ini)
- .gitignore excludes venv/ollama/models/runtime/db

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

system-requirements.txt

@@ -0,0 +1,107 @@
+beautifulsoup4==4.12.3
+blinker==1.7.0
+Brlapi==0.8.5
+Brotli==1.1.0
+ccsm==0.9.14.2
+certifi==2023.11.17
+chardet==5.2.0
+click==8.1.6
+colorama==0.4.6
+command-not-found==0.3
+compizconfig-python==0.9.14.2
+configobj==5.0.8
+cryptography==41.0.7
+cssselect==1.2.0
+cupshelpers==1.0
+dbus-python==1.3.2
+defer==1.0.6
+deprecation==2.0.7
+dill==0.3.8
+distro==1.9.0
+distro-info==1.7+build1
+eyed3==0.9.7
+filelock==3.13.1
+filetype==1.2.0
+fuse-python==1.0.7
+gyp==0.1
+html2text==2024.2.26
+httplib2==0.20.4
+idna==3.6
+ifaddr==0.2.0
+language-selector==0.1
+launchpadlib==1.11.0
+lazr.restfulclient==0.14.6
+lazr.uri==1.0.6
+libevdev==0.5
+louis==3.29.0
+lxml==5.2.1
+Mako==1.3.2.dev0
+Markdown==3.5.2
+markdown-it-py==3.0.0
+MarkupSafe==2.1.5
+mdurl==0.1.2
+menulibre==2.4.0
+mugshot==0.4.3
+multiprocess==0.70.16
+mutagen==1.46.0
+netaddr==0.8.0
+netifaces==0.11.0
+numpy==1.26.4
+oauthlib==3.2.2
+onboard==1.4.1
+packaging==24.0
+PAM==0.4.2
+pexpect==4.9.0
+pillow==10.2.0
+psutil==5.9.8
+ptyprocess==0.7.0
+pycairo==1.25.1
+pycryptodomex==3.20.0
+pycups==2.0.1
+pycurl==7.45.3
+pyelftools==0.30
+Pygments==2.17.2
+PyGObject==3.48.2
+PyICU==2.12
+PyJWT==2.7.0
+pylibacl==0.7.0
+PyNaCl==1.5.0
+pyparsing==3.1.1
+pyparted==3.12.0
+pypng==0.20231004.0
+PyQt5==5.15.10
+PyQt5-sip==12.13.0
+python-apt==2.7.7+ubuntu5.2
+python-debian==0.1.49+ubuntu2
+python-gnupg==0.5.2
+pyudev==0.24.0
+pyxattr==0.8.1
+pyxdg==0.28
+PyYAML==6.0.1
+qrcode==7.4.2
+repolib==2.2.1
+requests==2.31.0
+requests-file==1.5.1
+rich==13.7.1
+scour==0.38.2
+setproctitle==1.3.3
+setuptools==68.1.2
+six==1.16.0
+soupsieve==2.5
+systemd-python==235
+tldextract==3.1.2
+tornado==6.4
+typing_extensions==4.10.0
+ubuntu-drivers-common==0.0.0
+ubuntu-pro-client==8001
+ufw==0.36.2
+unattended-upgrades==0.1
+Unidecode==1.3.8
+urllib3==2.0.7
+wadllib==1.3.6
+websockets==10.4
+wheel==0.42.0
+xdg==5
+xkit==0.0.0
+xlrd==2.0.1
+yt-dlp==2024.4.9