fix(mcp): add content to structuredContent

Florian Imdahlrequested to merge
ffflorian/glab-cli:fix/structured-content into main

Description

Taking over from !2756 (closed).

Related Issues

Resolves #8104 (closed)

How has this been tested?

See !2756 (closed)

Screenshots (if appropriate):

Edited by Florian Imdahl

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