Rename gsync/esync -> sync-git/emacs respectively

Realised there's a real program in the GNU coreutils called gsync so
wanted to avoid a collision

system/home/scripts/default.nix

@@ -1,9 +1,9 @@
 { pkgs, ... }:
 {
   home.packages = [
+    (pkgs.writeShellScriptBin "sync-git" (builtins.readFile ./shell/sync-git.sh))
+    (pkgs.writeShellScriptBin "sync-emacs" (builtins.readFile ./shell/sync-emacs.sh))
     (pkgs.writeShellScriptBin "ensure-pass" (builtins.readFile ./shell/ensure-pass.sh))
-    (pkgs.writeShellScriptBin "esync" (builtins.readFile ./shell/esync.sh))
-    (pkgs.writeShellScriptBin "gsync" (builtins.readFile ./shell/gsync.sh))
     (pkgs.writeShellScriptBin "clean-config" (builtins.readFile ./shell/clean-config.sh))
     (pkgs.writeShellScriptBin "rsync-local-config" (builtins.readFile ./shell/rsync-local-config.sh))
     (pkgs.writeShellScriptBin "xdg-query-program" (builtins.readFile ./shell/xdg-query-program.sh))