move system packages declaration to modules dir

nixos/modules/packages.nix

@@ -0,0 +1,87 @@
+{ pkgs, config, ... }:
+
+{ 
+  # List packages installed in system profile.
+  environment.systemPackages = with pkgs; [
+    wget
+    vim
+    vimPlugins.vim-nix
+    vimPlugins.pathogen
+    tmux
+    htop
+    zsh
+    btrfs-progs
+    git
+    python3
+    man-pages
+    dnsutils
+    netcat
+    ntfs3g
+    file
+    multipath-tools
+    strace
+    ltrace
+    valgrind
+    testdisk
+    rsync
+    pv
+    exfat
+    iotop
+    cifs-utils
+    dstat
+    lsof
+    macchanger
+    borgbackup
+
+    # for debugging WLAN failures:
+    ethtool
+    trace-cmd
+    
+    # NetworkManager stuff
+    networkmanager-openconnect
+    networkmanager-vpnc
+    networkmanager-openvpn
+    plasma5Packages.kdeGear.akonadi-mime # for KOrganizer
+    ]
+  ++ (with plasma5Packages; with kdeGear; [
+    #akonadi
+    #akonadi-calendar
+    #akonadi-contacts
+    #akonadi-import-wizard
+    #akonadi-mime
+    #akonadi-notes
+    #akonadi-search
+    #akonadiconsole
+    #akregator
+    #kaddressbook
+    #kalarm
+    #kalarmcal
+    #kcalutils
+    #kcontacts
+    #kdav
+    #kdepim-addons
+
+    #kdepim-runtime
+    #kidentitymanagement
+    #kldap
+    #kmail
+    #kmailtransport
+    #kmbox
+    #kmime
+    #kontact
+    #kontactinterface
+    #korganizer
+    #kpimtextedit
+    #libkdepim
+    #libksieve
+    #mailcommon
+    #messagelib
+    #pimcommon
+    #pim-sieve-editor
+
+    # for some Flatpak packkages
+    accountsservice
+  ]);
+}
+
+