Add Templates CLI

CLI commands for adding templates to PraisonAI

bash
praisonai templates add github:user/repo/template-name
bash
praisonai templates add github:MervinPraison/Agent-Recipes/ai-video-editor
bash
praisonai templates add ./my-template
bash
praisonai templates add /path/to/template
bash
praisonai templates add-sources github:MervinPraison/Agent-Recipes
bash
praisonai templates add-sources github:user/custom-templates
bash
praisonai templates remove-sources github:user/repo
bash
praisonai templates list
bash
praisonai templates info ai-video-editor