feat: nexus enable mode

[VGabriel45]

PR-Codex overview

This PR adds constants and types related to module validation and enablement. It also includes functions for module type and initialization checks.

Detailed summary

• Added constants for validation and enablement modes
• Defined types for validation and enablement modes
• Updated functions to include validation mode parameter
• Implemented functions for module type and initialization checks

The following files were skipped due to too many changes: tests/account/write.test.ts, src/account/NexusSmartAccount.ts, tests/account/read.test.ts

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[github-actions[bot]]

size-limit report 📦

Path	Size
core (esm)	130.21 KB (+0.42% 🔺)
core (cjs)	152.41 KB (+0.27% 🔺)
account (tree-shaking)	127.7 KB (+0.24% 🔺)
bundler (tree-shaking)	6.31 KB (+0.28% 🔺)
paymaster (tree-shaking)	5.88 KB (0%)