Fix init script setup and preserve build artifacts

- Copy configs/init as /sbin/init instead of creating symlink to zinit
- Remove automatic cleanup of build artifacts - always preserve for incremental builds
- Allows rebuilding initramfs with existing components
- Use ./scripts/clean.sh to manually clean when needed

scripts/build.sh

@@ -358,18 +358,10 @@ function main_build_process() {
     fi
 }
 
-# Cleanup build artifacts
+# Keep all build artifacts by default for incremental builds and debugging
 function cleanup_build_artifacts() {
-    if [[ "$KEEP_ARTIFACTS" != "true" ]]; then
-        section_header "Cleaning Build Artifacts"
-        
-        components_cleanup "$COMPONENTS_DIR" "false"
-        kernel_cleanup "$KERNEL_DIR" "false"
-        
-        log_info "Build artifacts cleaned"
-    else
-        log_info "Keeping build artifacts as requested"
-    fi
+    log_info "Build artifacts preserved for incremental builds"
+    log_info "Use ./scripts/clean.sh to manually clean artifacts when needed"
 }
 
 # Main function
@@ -424,7 +416,7 @@ function main() {
         return 1
     fi
     
-    # Cleanup if requested
+    # Always preserve artifacts for incremental builds
     cleanup_build_artifacts
     
     section_header "Zero OS Build Complete"