Use cosmic_bg_config to get background

Scaling doesn't match `cosmic-bg`?

Cargo.lock

@@ -867,6 +867,15 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
+[[package]]
+name = "colorgrad"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a5f405d474b9d05e0a093d3120e77e9bf26461b57a84b40aa2a221ac5617fb6"
+dependencies = [
+ "csscolorparser",
+]
+
 [[package]]
 name = "com"
 version = "0.6.0"
@@ -967,6 +976,20 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cosmic-bg-config"
+version = "0.1.0"
+source = "git+https://github.com/pop-os/cosmic-bg#742a3444cd7f599184d6f553a2a7bc91e19084a6"
+dependencies = [
+ "colorgrad",
+ "cosmic-config",
+ "derive_setters",
+ "image",
+ "ron",
+ "serde",
+ "tracing",
+]
+
 [[package]]
 name = "cosmic-client-toolkit"
 version = "0.1.0"
@@ -994,6 +1017,7 @@ version = "0.1.0"
 source = "git+https://github.com/pop-os/libcosmic#a0ed887b7d73ebb69c2aff7bb230c43d9754c742"
 dependencies = [
  "atomicwrites",
+ "calloop",
  "cosmic-config-derive",
  "dirs 5.0.1",
  "iced_futures",
@@ -1073,6 +1097,7 @@ dependencies = [
  "calloop",
  "calloop-wayland-source",
  "clap",
+ "cosmic-bg-config",
  "cosmic-comp-config",
  "cosmic-config",
  "delegate",