Improved NanoVNA V2 case

SummaryImproved case for the NanoVNA v2. Changes from @corecode's case:-Lip around the case for sealing the 2 pieces together-Straight screw holes for sinking the screws-Holes for lights-Place for adding a lanyard loop (or string for the pen)After bad experiences with cheap clones, I ordered this genuine NanoVNA v2:https://s.click.aliexpress.com/e/_dSfuJ3tBattery:https://s.click.aliexpress.com/e/_dUXxoULRequires 8x M3 12 mm screws:https://s.click.aliexpress.com/e/_dZTdo1DButton head screws also look good.