Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle