feat: Deployed and Verified SponsorPaymaster on Mainnet (#25)

## Summary

Deployed and verified SponsorPaymaster on Arbitrum, Ethereum, and
Polygon.

## Detail
### Changeset

- Deployed implementation contracts and proxies
- Verified implementation contracts and proxies
- Created broadcast artifacts to document deployment

### Checklist
- [x] Did you add new tests and confirm all tests pass? (`yarn test`)
- [x] Did you update relevant docs? (docs are found in the `docs`
folder)
- [x] Do your commits follow the [Conventional
Commits](https://www.conventionalcommits.org/en/v1.0.0/) standard?
- [x] Does your PR title also follow the [Conventional
Commits](https://www.conventionalcommits.org/en/v1.0.0/) standard?
- [x] If you have a breaking change, is it [correctly reflected in your
commit
message](https://www.conventionalcommits.org/en/v1.0.0/#examples)? (e.g.
`feat!: breaking change`)
- [x] Did you run lint (`yarn lint`) and fix any issues?
- [x] Did you run formatter (`yarn format:check`) and fix any issues
(`yarn format:write`)?

## Testing

Deployment. No testing needed at this time.

## Documentation
Optional section.
Link to the doc.

broadcast/012_DeploySponsorPaymaster.s.sol/1/README.md

@@ -0,0 +1,3 @@
+- This chain used cast send to deploy so there's no corresponding run json
+- Ran command in `script/cmd/DeploySponsorPaymaster` and `script/cmd/DeploySponsorPaymasterProxy`
+- tx hash: 0x30095b70511bac2c1be4aef48d32be235f608cdb988f36746eda05c1fc63fb24, 0x462898aa1f6b2b62163e15ee45cf6b984ae340087fabea9af633cf3c6b99a4a8 

broadcast/012_DeploySponsorPaymaster.s.sol/137/README.md

@@ -0,0 +1,3 @@
+- This chain used cast send to deploy so there's no corresponding run json
+- Ran command in `script/cmd/DeploySponsorPaymaster` and `script/cmd/DeploySponsorPaymasterProxy`
+- tx hash: 0x39d83a160e4dac21329a0c43f2b475a414fdde3002c6a845de6cbb59cfde299a, 0xf779d3c44f543a3199347b8c81440cf9669ff1c16e22f66e05a828534453110d 

broadcast/012_DeploySponsorPaymaster.s.sol/42161/README.md

@@ -0,0 +1,3 @@
+- This chain used cast send to deploy so there's no corresponding run json
+- Ran command in `script/cmd/DeploySponsorPaymaster` and `script/cmd/DeploySponsorPaymasterProxy`
+- tx hash: 0xf47672ce7fbe57d5e61136814a38b194b041c3c12c64744823dea71b43373fea, 0x95f6708be7d272f5d3dc028de72238c2d20c73349c5191ddf31ef9f282805961