feat: webwallet connector theme option

[bluecco]

Issue / feature description

Adding theme option to webwallet to let developers select dark or light
auto will use the webwallet options

Changes

• updated trpc input procedure

Checklist

• Rebased to the last commit of the target branch (or merged)
• Code self-reviewed
• Code self-tested
• Tests updated (if needed)
• All tests are passing locally

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