Support Simple7702Account on EntryPoint v0.9

[LiorAgnin]

Parent

Parent issue: #20

What to build

Support Simple7702Account on EntryPoint v0.9 as an explicit opt-in path. The EIP-7702 Simple account should select the official v0.9 Simple7702 implementation when configured for v0.9, preserve existing v0.8 behavior, and keep authorization-aware gas estimation and submission working end-to-end.

Acceptance criteria

• EIP-7702 Simple account configuration accepts an explicit EntryPoint version.
• v0.8 remains the backward-compatible default unless a different version is selected.
• v0.9 selects Simple7702Account 0xa46cc63eBF4Bd77888AA327837d20b23A63a56B5 when no custom logic address is provided.
• Unsupported EntryPoint versions for EIP-7702 Simple accounts fail clearly.
• Account address behavior remains owner EOA address behavior.
• Authorization-aware estimation includes eip7702Auth for v0.9 when authorization is needed.
• Authorization-aware submission includes eip7702Auth for v0.9 when authorization is needed.
• Tests cover v0.8 preservation, v0.9 address selection, unsupported versions, and mocked authorization-aware payloads.

Blocked by

• Add opt-in EntryPoint v0.9 core support #21

[LiorAgnin]

Ralph opened draft PR: #28