feat: Contributing label definitions

Merge pull request #6817 from ethereum-optimism/08-16-fix_contracts-bedrock_Use_npx_in_contracts-bedrock_so_it_doesn_t_depend_on_pnpm_i

fix(contracts-bedrock): Use npx in contracts-bedrock so it doesn't depend on pnpm i

Merge branch 'develop' into 08-16-fix_contracts-bedrock_Use_npx_in_contracts-bedrock_so_it_doesn_t_depend_on_pnpm_i

feat(indexer): Add tokens to the db schema

contracts-bedrock: upgrade to multichain script

Web3.js Plugin for Fee Estimation

contracts-bedrock: slight cleanup + docs

feat(indexer): Add basic docs