Changed BINARY_NAME from lambda.exe to lambda and updated all execution references to use the ${BINARY_NAME} variable.
Added lambda binary to .gitignore.
Added a help target that displays all available Makefile targets with descriptions.
Set help as the default goal so running 'make' without arguments shows usage information.
Renamed the 'it' target to 'build' for better clarity and conventional naming.
Updated all target dependencies (run, profile, explain) to reference the new build target.