review and dev notes + fixing some tests + implementations later

[livingrockrises]

PR-Codex overview

This PR introduces a new solady dependency, adds a SmartSessionModule, updates constants, and refactors test files.

Detailed summary

• Added solady dependency
• Introduced SmartSessionModule
• Updated constants and modules
• Refactored test files

The following files were skipped due to too many changes: src/account/NexusSmartAccount.ts, src/modules/utils/Types.ts, tests/account.write.test.ts, src/modules/validators/SmartSessionModule.ts, tests/smart.sessions.write.test.ts, src/modules/utils/SmartSessionHelpers.ts, src/modules/utils/abi.ts

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[livingrockrises]

we need to get smart session deployment for our tests and real chain wide constant. cc @joepegler

[github-actions[bot]]

size-limit report 📦

Path	Size
core (esm)	15.85 KB (+0.05% 🔺)
core (cjs)	21.06 KB (+0.29% 🔺)
bundler (tree-shaking)	4.63 KB (0%)
paymaster (tree-shaking)	2.42 KB (0%)