feat: move proto related code to a different package

[seeflood]

What this PR does:
Move proto related code to a different package.
It will make the code clean and easy to import

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

Merging #375 (d3af1f4) into main (be22e2f) will increase coverage by 0.09%.
The diff coverage is 43.84%.

@@            Coverage Diff             @@
##             main     #375      +/-   ##
==========================================
+ Coverage   57.42%   57.52%   +0.09%     
==========================================
  Files         107      108       +1     
  Lines        5762     5832      +70     
==========================================
+ Hits         3309     3355      +46     
- Misses       2114     2134      +20     
- Partials      339      343       +4     

Impacted Files	Coverage Δ
pkg/grpc/dapr/dapr_api_state.go	0.00% <0.00%> (ø)
pkg/grpc/default_api/api_callback.go	20.38% <0.00%> (ø)
pkg/grpc/default_api/lock.go	100.00% <ø> (ø)
pkg/grpc/default_api/sequencer.go	56.25% <ø> (ø)
pkg/runtime/state/compatibility.go	100.00% <ø> (+25.45%)	⬆️
pkg/grpc/default_api/api_state.go	82.35% <82.22%> (ø)
pkg/grpc/default_api/api.go	75.95% <94.73%> (+0.14%)	⬆️
pkg/grpc/default_api/subscriptions.go	62.50% <100.00%> (ø)
components/lock/zookeeper/zookeeper_lock.go	64.28% <0.00%> (+8.92%)	⬆️
pkg/runtime/options.go	34.09% <0.00%> (+20.45%)	⬆️
... and 2 more

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[seeflood]

I added the Dapr SaveState API as an example @zach030

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!