chore: Add .gitignore for build artifacts

- Ignore components/, initramfs/, kernel/, dist/ directories
- Ignore build logs and temporary files
- Prevent future accidental commits of build artifacts

.gitignore

@@ -0,0 +1,39 @@
+# Zero OS Alpine Initramfs Builder - Build Artifacts
+
+# Build directories (generated during build)
+components/
+initramfs/
+kernel/
+dist/
+
+# Build logs
+*.log
+build*.log
+nohup.out
+
+# Temporary files
+/tmp/
+*.tmp
+
+# Container artifacts (if any local storage)
+.docker/
+.podman/
+
+# Rust build artifacts (if any escape component dirs)
+target/
+Cargo.lock
+
+# Alpine downloads
+alpine-miniroot*.tar.gz
+linux-*.tar.xz
+
+# Editor and IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+Thumbs.db