home: wm: i3bar: add bluetooth blocks

I have decided that the potential security and privacy risk of exposing
my MAC addresses is fine by me.

My earphones and headphones do not seem to expose their battery level,
would need more investigation.

home/wm/i3bar/default.nix

@@ -25,6 +25,24 @@ in
               dynamic_width = true;
               hide_when_empty = true;
             }
+            (lib.optionalAttrs config.my.home.bluetooth.enable {
+              block = "bluetooth";
+              mac = "4C:87:5D:06:40:D9";
+              hide_disconnected = true;
+              format = "Boson {percentage}";
+            })
+            (lib.optionalAttrs config.my.home.bluetooth.enable {
+              block = "bluetooth";
+              mac = "94:DB:56:00:EE:93";
+              hide_disconnected = true;
+              format = "Protons {percentage}";
+            })
+            (lib.optionalAttrs config.my.home.bluetooth.enable {
+              block = "bluetooth";
+              mac = "F7:78:BA:76:52:F7";
+              hide_disconnected = true;
+              format = "MX Ergo {percentage}";
+            })
             {
               block = "cpu";
             }