refactor: Use haumea for filesystem-based module system for flake outputs

refactor: Use hyphen(`-`) for variable names & folder names(except Python), replace all unserscore(`_`) with hyphen(`-`).

modules/nixos/base/user-group.nix

@@ -1,5 +1,5 @@
 {
-  username,
+  myvars,
   config,
   ...
 }: {
@@ -7,7 +7,7 @@
   users.mutableUsers = false;
 
   users.groups = {
-    "${username}" = {};
+    "${myvars.username}" = {};
     docker = {};
     wireshark = {};
     # for android platform tools's udev rules
@@ -19,14 +19,14 @@
     uinput = {};
   };
 
-  users.users."${username}" = {
+  users.users."${myvars.username}" = {
     # generated by `mkpasswd -m scrypt`
     # we have to use initialHashedPassword here when using tmpfs for /
     initialHashedPassword = "$7$CU..../....KDvTIXqLTXpmCaoUy2yC9.$145eM358b7Q0sRXgEBvxctd5EAuEEdao57LmZjc05D.";
-    home = "/home/${username}";
+    home = "/home/${myvars.username}";
     isNormalUser = true;
     extraGroups = [
-      username
+      myvars.username
       "users"
       "networkmanager"
       "wheel"
@@ -39,7 +39,7 @@
 
   # root's ssh key are mainly used for remote deployment
   users.users.root = {
-    initialHashedPassword = config.users.users."${username}".initialHashedPassword;
-    openssh.authorizedKeys.keys = config.users.users."${username}".openssh.authorizedKeys.keys;
+    initialHashedPassword = config.users.users."${myvars.username}".initialHashedPassword;
+    openssh.authorizedKeys.keys = config.users.users."${myvars.username}".openssh.authorizedKeys.keys;
   };
 }