refactor: split common/nixos.nix and -/home.nix

Split these big files into modular files that
are easier to share and read on their own.

profiles/common/nixos/packages.nix

@@ -0,0 +1,81 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    # yubikey packages
+    gnupg
+    yubikey-personalization
+    yubikey-personalization-gui
+    yubico-pam
+    yubioath-flutter
+    yubikey-manager
+    yubikey-manager-qt
+    yubico-piv-tool
+    cfssl
+    pcsctools
+    pcscliteWithPolkit.out
+
+    # ledger packages
+    ledger-live-desktop
+
+    # pinentry
+
+    # theme related
+    adwaita-icon-theme
+
+    # kde-connect
+    xdg-desktop-portal
+
+    # bluetooth
+    bluez
+
+    # lsp-related -------------------------------
+    # nix
+    # latex
+    texlab
+    ghostscript_headless
+    # wireguard
+    wireguard-tools
+    # rust
+    rust-analyzer
+    clippy
+    rustfmt
+    # go
+    go
+    gopls
+    # zig
+    zig
+    zls
+    # cpp
+    clang-tools
+    # + cuda
+    cudatoolkit
+    #lsp-bridge / python
+    gcc
+    gdb
+    (python3.withPackages (ps: with ps; [ jupyter ipython pyqt5 epc orjson sexpdata six setuptools paramiko numpy pandas scipy matplotlib requests debugpy flake8 gnureadline python-lsp-server ]))
+    # (python3.withPackages(ps: with ps; [ jupyter ipython pyqt5 numpy pandas scipy matplotlib requests debugpy flake8 gnureadline python-lsp-server]))
+    # --------------------------------------------
+
+    (stdenv.mkDerivation {
+      name = "oama";
+
+      src = pkgs.fetchurl {
+        name = "oama";
+        url = "https://github.com/pdobsan/oama/releases/download/0.13.1/oama-0.13.1-Linux-x86_64-static.tgz";
+        sha256 = "sha256-OTdCObVfnMPhgZxVtZqehgUXtKT1iyqozdkPIV+i3Gc=";
+      };
+
+      phases = [
+        "unpackPhase"
+      ];
+
+      unpackPhase = ''
+        mkdir -p $out/bin
+        tar xvf $src -C $out/
+        mv $out/oama-0.13.1-Linux-x86_64-static/oama $out/bin/
+      '';
+
+    })
+
+  ];
+}