feat: migrate tasks from Taskfile.yaml and Taskfile.yml to justfile (#13)

Author: orangekame3

Taskfile.yaml

@@ -0,0 +1,33 @@
+# Default recipe
+default:
+    @just --list
+
+# Build the project
+build:
+    cargo build
+
+# Run the project
+run:
+    cargo run
+
+# Run tests
+test:
+    cargo test
+
+# Format code
+fmt:
+    cargo fmt
+
+# Run clippy
+clippy:
+    cargo clippy -- -D warnings
+
+# Clean build artifacts
+clean:
+    cargo clean
+
+# Lint: format check + clippy
+lint: fmt clippy
+
+# Check: build + test + clippy
+check: build test clippy