chore: release v4.4.5

[joepegler]

PR-Codex overview

This PR updates the Biconomy SDK version, introduces new features related to token payments and session support, and improves testing coverage for account operations.

Detailed summary

• Updated SDK version to 4.4.5 with modifications for token payment and session support
• Added helpers for privateKey translation
• Tweaked functions to return last n leaves by default
• Improved testing coverage for account operations

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[github-actions]

size-limit report 📦

Path	Size
core (esm)	54.59 KB (+0.22% 🔺)
core (cjs)	59.79 KB (-0.08% 🔽)
account (tree-shaking)	52.26 KB (-0.15% 🔽)
bundler (tree-shaking)	2.63 KB (0%)
paymaster (tree-shaking)	2.33 KB (0%)
modules (tree-shaking)	40.57 KB (0%)