Add default target to Makefile, enhance Ollama class to use tools, and introduce Agent and SampleAgent classes for interactive tool usage. Update Javadoc generation message and improve error handling in endpoint callers.

Makefile

@@ -1,3 +1,7 @@
+# Default target
+.PHONY: all
+all: dev build
+
 dev:
 	@echo "Setting up dev environment..."
 	@command -v pre-commit >/dev/null 2>&1 || { echo "Error: pre-commit is not installed. Please install it first."; exit 1; }
@@ -43,7 +47,7 @@ doxygen:
 	@doxygen Doxyfile
 
 javadoc:
-	@echo "\033[0;34mGenerating Javadocs into '$(javadocfolder)'...\033[0m"
+	@echo "\033[0;34mGenerating Javadocs...\033[0m"
 	@mvn clean javadoc:javadoc
 	@if [ -f "target/reports/apidocs/index.html" ]; then \
 		echo "\033[0;32mJavadocs generated in target/reports/apidocs/index.html\033[0m"; \