The folks at the RNA Bioscience Initiative have created the djvdj package that contains many useful functions for exploring V(D)J Sequencing data, usually obtained via 10X Genomics and CellRanger.
Here, I've done some very light editing to make the functions work with with SingleCellExperiment objects. Note that they will only work with SCE objects; if you insist on Seurat objects, use the original package.
The djvdj README contains some nice pointers on how to get started.