fix(rln-cli): handle missing or empty config file; improve readability of input/output; remove duplicate config field
fix(rln-cli): back to using path for input data in RLN-CLI, add real-world spam prevention example
fix(rln-cli): fix Readme.md format, remove TREE_HEIGHT constant and fix recover_id_secret part for relay example
fix(rln-cli): implement stateless RLN example
fix(rln-cli): add missing Cargo.lock update
fix(rln-cli): update RLN-CLI version to 0.7.0
