fix: reject empty name/ticker/description in launch command#10

P-r-e-m-i-u-m wants to merge 4 commits intochainstacklabs:mainchainstacklabs/pumpfun-cli:mainfrom

P-r-e-m-i-u-m:fix/validate-launch-inputsP-r-e-m-i-u-m/pumpfun-cli:fix/validate-launch-inputsCopy head branch name to clipboard