feat: migrate starknetkit to starknet v9 and align connector types

[dmcrodrigues]

Issue / feature description

Migrate starknetkit to Starknet v9 and align connector typing with the newer
starknet-react/starknet-start expectations, while keeping behavior and code
patterns unchanged.

Changes

• Pin @starknet-io/get-starknet and @starknet-io/get-starknet-core to 4.0.8.
• Update starknet dev dependency from ^8.5.2 to pinned 9.1.1.
• Update starknet peer dependency from ^8.0.0 to >=9.0.0.
• Align connector account(...) signatures to ProviderInterface plus optional
  PaymasterInterface across connector implementations.
• Remove ProviderOptions usage from connector type definitions.
• Update pnpm-lock.yaml to match pinned dependency versions and Starknet v9
  resolution.
• Apply minimal type-safety follow-ups required by current TS settings (import type usage and required modal props), without changing runtime behavior.
• Validate with:
  • pnpm install --frozen-lockfile --ignore-scripts
  • pnpm run check
  • pnpm run build

Checklist

• Rebased to the last commit of the target branch (or merged)
• Code self-reviewed
• Code self-tested
• Tests updated (if needed)
• All tests are passing locally

[Cussone]

Looks good. It's best to test it manually so we are 100% sure there is no weird stuff. We can release it under a tag.