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.

Makefile

@@ -12,6 +12,7 @@ BINDIR      ?= $(PREFIX)/bin
 DATADIR     ?= $(PREFIX)/share/yali
 LOCALEDIR   ?= $(DATADIR)/locales
 ASSETSDIR   ?= $(DATADIR)/assets
+SLIDESDIR   ?= $(DATADIR)/slides
 DESKTOPDIR  ?= $(PREFIX)/share/applications
 PIXMAPDIR   ?= $(PREFIX)/share/pixmaps
 
@@ -128,6 +129,10 @@ install: release
 	install -dm755 $(DESTDIR)$(LOCALEDIR)
 	install -m644 locales/*.toml $(DESTDIR)$(LOCALEDIR)/
 
+	# Slayt dosyaları
+	install -dm755 $(DESTDIR)$(SLIDESDIR)
+	cp -r slides/* $(DESTDIR)$(SLIDESDIR)/
+
 	# .desktop girdisi
 	install -Dm644 assets/yali.desktop $(DESTDIR)$(DESKTOPDIR)/yali.desktop
 
@@ -141,6 +146,7 @@ uninstall:
 	rm -rf $(DESTDIR)$(DATADIR)
 	rm -f  $(DESTDIR)$(DESKTOPDIR)/yali.desktop
 	rm -f  $(DESTDIR)$(PIXMAPDIR)/yali.png
+	rm -rf $(DESTDIR)$(SLIDESDIR)
 	@echo "$(BOLD)$(GREEN)✓ Kaldırıldı$(RESET)"
 
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