feat(bar): dpi-awareness + position hotloading

This commit ensures that the komorebi-bar.exe process is DPI aware and
applies DPI compensation to viewport.position and viewport.inner size
both on launch and on configuration reload.  viewport.position changes
are now hotloaded wihtout having to restart the process.

re #1024

Cargo.lock

@@ -501,6 +501,12 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "atomic_float"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "628d228f918ac3b82fe590352cc719d30664a0c13ca3a60266fe02c7132d480a"
+
 [[package]]
 name = "atspi"
 version = "0.19.0"
@@ -2705,6 +2711,7 @@ dependencies = [
 name = "komorebi-bar"
 version = "0.1.30"
 dependencies = [
+ "atomic_float",
  "chrono",
  "clap",
  "color-eyre",