fix(optimizeDeps): added @accordproject/template-engine to vite optimizeDeps to speed up cold start

[Vinyl-Davyl]

Fix

This pull request optimizes the build performance of the project by addressing the Vite warning regarding mixed ESM and CJS modules.

Changes

• Added the package @accordproject/template-engine to optimizeDeps.needsInterop in vite.config.js to improve cold start performance.
• This change aims to enhance the build performance and reduce the likelihood of encountering mixed module issues during development.

Author Checklist

• [x] Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• [x] Vital features and changes captured in unit and/or integration tests
• [x] Commits messages follow AP format
• [x] Extend the documentation, if necessary
• [x] Merging to main from fork:branchname

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