Rename to usync, use generic git URLs

- Rename app binary from unsbs-setup to usync-setup
- Update README to use git+ssh:// URLs for custom git servers
- Remove GitHub-specific references

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -11,12 +11,12 @@ A NixOS-based system for managing the three types of data in a computer:
 ## Quick Start
 
 ```bash
-# One-command setup (interactive)
-nix run github:YOUR_USERNAME/ultimate-notetaking-sync-backup-system
+# One-command setup from any git server
+nix run 'git+ssh://git@your-server/you/usync.git'
 
-# Or clone first
-git clone https://github.com/YOUR_USERNAME/ultimate-notetaking-sync-backup-system.git
-cd ultimate-notetaking-sync-backup-system
+# Or clone first, then run
+git clone git@your-server:you/usync.git
+cd usync
 nix run .
 ```
 
@@ -26,8 +26,8 @@ nix run .
 
 ```bash
 # 1. Clone the repo
-git clone https://github.com/YOUR_USERNAME/ultimate-notetaking-sync-backup-system.git
-cd ultimate-notetaking-sync-backup-system
+git clone git@your-server:you/usync.git
+cd usync
 
 # 2. Run setup (one command - includes all dependencies)
 nix run .
@@ -38,20 +38,20 @@ nix run .
 
 # 4. Push config to your git server
 cd ~/.config/usync/config
-git remote add origin git@your-server:you/config.git
+git remote add origin git@your-server:you/usync-config.git
 git push -u origin main
 ```
 
 ### Additional Computers (Joining)
 
 ```bash
-# One command with your git URL and age key
-nix run github:YOUR_USERNAME/ultimate-notetaking-sync-backup-system
+# One command from your git server
+nix run 'git+ssh://git@your-server/you/usync.git'
 # Choose option [2], enter your git URL and age key
 
 # Or non-interactively:
-nix develop
-./setup <git-url> <your-age-key>
+git clone git@your-server:you/usync.git && cd usync
+nix run . -- <config-git-url> <your-age-key>
 ```
 
 ### Mobile Device (Phone/Tablet)
@@ -78,10 +78,10 @@ Add to your flake.nix inputs, then import the module:
 
 ```nix
 {
-  inputs.unsbs.url = "github:YOUR_USERNAME/ultimate-notetaking-sync-backup-system";
+  inputs.usync.url = "git+ssh://git@your-server/you/usync.git";
 
   # In your configuration:
-  imports = [ inputs.unsbs.nixosModules.default ];
+  imports = [ inputs.usync.nixosModules.default ];
 }
 ```