Enable peaclock and bump locked revisions

Add peaclock to the core packages list and enable the peaclock module in
all system configurations. Update the flake.lock entries for several
packages with newer revisions and nar hashes.

modules/core/packages/packages.nix

@@ -44,6 +44,7 @@
     winboat = [winboat freerdp];
     signal = signal-desktop;
     pixieditor = pixieditor;
+    peaclock = peaclock;
   };
 in {
   imports = builtins.attrValues (builtins.mapAttrs mkPackage packages);