PlantUML exporter should encode URL

[ggrossetie]

Description

The latest version of PlantUML 1.2025.0 is more restrictive regarding remote image URLs: plantuml/plantuml#2083 (reply in thread)

For instance, with the AWS theme, the PlantUML exporter will generate:

rectangle "Amazon Web Services\n<size:10>[Deployment Node]</size>\n\n<img:https://static.structurizr.com/themes/amazon-web-services-2020.04.30/AWS-Cloud_light-bg@4x.png{scale=0.21428571428571427}>" <<Live.AmazonWebServices>> as Live.AmazonWebServices {

The URL contains a @ which should now be encoded otherwise PlantUML will show an error (Unable to decode...).

Priority

Low (I'm willing to make a pull request - please confirm approach first)

More information

No response

[ggrossetie]

The latest version of the themes are not using @ anymore.
Feel free to close this issue if you think that it's unnecessary to encode URLs.