install: add snap option

[shcheklein]

@casperdcl as we discussed, could you please add this method to the docs as snap is official now?

[jorgeorpinel]

Seems like a duplicate of treeverse/dvc#7495 @schuhschuh ?

[shcheklein]

@jorgeorpinel no, this is one is simpler - just add the option. No need to think about ordering.

[casperdcl]

Ah right, will do

[casperdcl]

btw did we want to use any images/badges anywhere?