refactor: split huge jobs/mod.rs into modular files & modernize slideshow

- Split src/jobs/mod.rs into specialized domain files under src/jobs/ (autologin, bootloader, execution, finish, keyboard, location, netinstall, network, partition, users) for better modularity and cleaner architecture.
- Integrated chrono-tz and enabled serde features on chrono in Cargo.toml.
- Added missing assets (remixicon font, icons, slides images/configs).
- Integrated localized slideshow presentation directly into UI, reading configurations from TOML.
- Updated Makefile to correctly target and install slideshow files into system directories.
- Cleaned up obsolete bin utility slides_test.rs.

Cargo.toml

@@ -16,16 +16,13 @@ sysinfo       = "0.30"
 rust-i18n     = "3.1"
 lazy_static   = "1.4"
 async-trait   = "0.1"
-chrono        = "0.4"
+chrono        = { version = "0.4", features = ["serde"] }
+chrono-tz    = "0.8"
 xkbcommon = "0.9"
 
 [[bin]]
 name = "yali-rs"
 path = "src/main.rs"
 
-[[bin]]
-name = "slides_test"
-path = "src/bin/slides_test.rs"
-
 [patch.crates-io]
 # Yerel mudur veya comar-api kütüphaneleri buraya eklenebilir