By Uditha Jayasinghe COLOMBO (Reuters) -Sri Lankan President Gotabaya Rajapaksa declared a nationwide public emergency late on Friday following violent protests over the country’s worst economic crisis in decades. In a Sri Lankan government gazette notification, Rajapaksa said the decision was taken in the interests of public security, the protection of public order, and to ensure the maintenance of supplies and essential services. On Thursday hundreds of protesters clashed with police and military outside President Rajapaksa’s residence in a suburb of the capital, Colombo. Police arrested 53 …