feat: add storage protos

[coryan]

Fixes #36

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This change is 

[mr-salty]

Reviewed 2 of 2 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @coryan, @devbww, @devjgm, and @scotthart)

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CMakeLists.txt, line 333 at r1 (raw file):

Quoted 4 lines of code…

# for proto in "${protos[@]}"; do (cd cmake-build-
# debug/external/googleapis/src/googleapis_download; grep -H '^import '
# "${proto}" | grep -v google/protobuf); done | sed -e 's;google/;;g' -e
# 's/:import "/ /' -e 's/";//' -e 's;/;_;g' -e 's/\.proto/_protos/g'

Is this left over from something? looks like it's got line breaks in the wrong places