feat: add canva integration

[onyedikachi-david]

What does this PR do?

Adds Canva integration with 8 actions for design automation: create, upload, import, export, and manage designs/assets/folders.

Explain How the Feature Works

OAuth2 authentication with dynamic dropdowns for selecting Canva resources.

Relevant User Scenarios

• Automate design creation and asset management
• Convert documents to Canva designs
• Export designs in multiple formats

Fixes #8135 /claim #8135

[onyedikachi-david]

@kishanprmr

Canva requires PKCE with 'S256' method, but our OAuth2 framework currently only supports 'plain'. A follow-up PR will add configurable PKCE methods to support modern OAuth2 providers while maintaining backward compatibility.

raised here: #8144

[Ani-4x]

@onyedikachi-david I think you pushed package-lock.json by mistake. You can correct it if you don't mind as it will break stuff.

[nx-cloud[bot]]

View your CI Pipeline Execution ↗ for commit d45394df6a0d5d7463234212f98ba7b383dac8c1

Command	Status	Duration	Result
nx run tests-e2e:test-scenarios	❌ Failed	8s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-07-16 18:26:40 UTC

[onyedikachi-david]

This can be merged now @kishanprmr, I have merged the other PR #8144