feature(image): add condition to judge if a formula should be concealed or rendered.

[dirichy]

Did you check the docs?

• I have read all the snacks.nvim docs

Is your feature request related to a problem? Please describe.

The problem is that, firstly, for some very short or easy formula, I don't need them to be rendered. So I want to have a function to judge this, may be some option like

should_be_randered=function(treesitter_node,buffer)

Since I think the treesitter_node and buffer number carrys all information to judge if a formula should be rendered.

The second problem is that since sometimes there will be multiple formula in a line, I don't want to conceal them all or not conceal them all. Instead, I want to conceal those I am not editing and remain the one I am editing. Or some times, when the inline option is on, some formula is too big to be inline, so it will just show a placeholder and show image at next line. I want formulas not inline to be not concealed. So I think we should add more parameter in conceal condition, like treesitter_node, buffer, and whether it will be really inline as parameter of the condition function.

Describe the solution you'd like

Add a option to accept a function to judge if a node should be rendered.
Add more parameter to the function to judge if a node should be concealed.

Describe alternatives you've considered

For conceal may be I can manage them by my self. but for render I have no idea to do that.

Additional context

No response