chore: Configures mold linker for Linux

Configures the mold linker for Linux targets, excluding MIPS architectures due to incompatibility. This improves linking speed.

.cargo/config.toml

@@ -1,3 +1,4 @@
-[target.'cfg(target_os = "linux")']
+# Apply mold to all Linux targets EXCEPT MIPS
-linker = "clang"
+# MIPS is excluded because mold does not support it.
+[target.'cfg(all(target_os = "linux", not(any(target_arch = "mips", target_arch = "mips64"))))']
 rustflags = ["-C", "link-arg=-fuse-ld=mold"]