chore: repo cleanup for v0.2.0

- Fix read_cpu_temp loop: ok()? was aborting iteration on unreadable hwmon
  entries instead of continuing to the next; use let Ok(...) else continue
- Fix osd.rs: replace stdout.unwrap() with defensive let-else guard
- PKGBUILD: bump pkgver to 0.2.0, replace libpulse dep with wireplumber +
  pipewire-pulse + brightnessctl (actual runtime tools used)
- bakery.toml: same dep fix as PKGBUILD
- Cargo.toml: fix repository URL casing (breadway -> Breadway)
- theme.rs: add wifi-popover-row-unsaved opacity rule

bakery.toml

@@ -1,7 +1,7 @@
 name = "breadbar"
 description = "Minimal status bar and notification daemon for Hyprland"
 binaries = ["breadbar"]
-system_deps = ["gtk4", "gtk4-layer-shell", "iw", "libpulse"]
+system_deps = ["gtk4", "gtk4-layer-shell", "wireplumber", "pipewire-pulse", "brightnessctl", "iw"]
 optional_system_deps = ["hyprland"]
 bread_deps = []