Mermaid MaxTextSize support

[schenardie]

• [ X] I agree to follow the Code of Conduct that this project adheres to.
• [ X] I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Is your feature request related to a problem? Please describe.
When adding Mermaid diagrams they are limited to the default 50000 characters limit. A config can be made to increase that limit to any desired maxtextsize
Describe the solution you'd like
Implement a function to allow configuration of maxTextSize as per https://mermaid.js.org/config/schema-docs/config.html#maxtextsize

Thanks

[davidjgraph]

Not sure we really want to start exposing mermaid config, as it's not core functionality. If we just set it to 500k, should that cover everything?

[schenardie]

I have one of my graphs here with 503k characters.

I'm using mermaid with thumbnails, each image is base64 encoded with 50x50 and it has around 4k characters. I know this is my use case only but does increasing that limit to an absurd number would cause any issues on your side??

If not, I really can't say which number would be sensible but I don't think it matters, could be on the house of Millions.

Thanks