Meghan Markle’s half-sister has launched a fresh appeal against a court defamation ruling as a bitter legal feud between the Markle siblings deepens. Samantha Markle is looking to overturn a ruling which rejected her claims that Meghan portrayed her as a “lying, racist, fame-seeker” and suggested the two didn’t know each other growing up. And now, new court documents have come to light which detail the extent of Samantha’s scathing allegations against the Duchess of Sussex. In the documents, unearthed by The Sun, Samantha claims that “Meghan knew what she was doing, and how to do it”. They con…