added small test, train, and validation alignment files

tests/test_data/alignments/train/2q2k_B/bfd_uniref_hits.a3m

+>2Q2K_B
+MGSSHHHHHHSSGLVPGSHMDKKETKHLLKIKKEDYPQIFDFLENVPRGTKTAHIREALRRYIEEIGENP
+>UniRef100_A0A7H4EXK9 Plasmid segregation protein ParR n=1 Tax=Staphylococcus aureus TaxID=1280 RepID=A0A7H4EXK9_STAAU
+-------------------MKKKETQHLLKIKKEDYPQIFDFLEGLPRGTKTAHIREALLRYIADEGENP
+>UniRef100_UPI0009836679 plasmid segregation protein ParR n=1 Tax=Staphylococcus aureus TaxID=1280 RepID=UPI0009836679
+-------------------MDKKETQHLLKIKKQDYPQIFNFLEGLPKGTKTAHIREALMRYIAEEGQNP
+>tr|A0A0Q9XW80|A0A0Q9XW80_9STAP Uncharacterized protein OS=Staphylococcus sp. NAM3COL9 GN=ACA31_00310 PE=4 SV=1
+-------------------MSKQETNHLLKIKKKDYPQIFEFLEGVPKGTKTAHIREALLRYIEELGAPP
+>tr|A0A1E5U0W4|A0A1E5U0W4_STAXY Uncharacterized protein OS=Staphylococcus xylosus GN=AST15_04830 PE=4 SV=1
+-------------------MSKQETNHLLKIKKKDYPQIFDFLENVPKGTKTAHIREALIRYINDLGDTpP