Add Templates CLI

praisonai templates add github:user/repo/template-name

praisonai templates add github:MervinPraison/Agent-Recipes/ai-video-editor

praisonai templates add ./my-template

praisonai templates add /path/to/template

praisonai templates add-sources github:MervinPraison/Agent-Recipes

praisonai templates add-sources github:user/custom-templates

praisonai templates remove-sources github:user/repo

praisonai templates list

praisonai templates info ai-video-editor