Add various packages and patches for build system improvements

- Introduced valgrind with a patch to respect flags and updated its configuration.
- Added Vulkan ICD loader with CMake build configuration.
- Implemented Waf build system with a custom build script and configuration.
- Included Wayland protocols with Meson build system.
- Added xcb-util-keysyms with autotools configuration.
- Introduced Yasm with multiple patches for compatibility and improvements.
- Added Yelp tools and XSL with Meson build configurations and necessary patches for POSIX compliance.

extra/fontconfig/40-fontconfig-config.toml

@@ -0,0 +1,12 @@
+[hook]
+name = "fontconfig-config"
+description = "Updating fontconfig configuration..."
+
+[when]
+phase = "post"
+operation = ["install", "remove"]
+paths = ["usr/share/fontconfig/conf.default/*"]
+
+[exec]
+command = "/usr/share/depot.d/scripts/fontconfig/40-fontconfig-config /etc/fonts/conf.d"
+needs_paths = true