[Feature request] Option to include CLI arguments (esp --input)

[kescobo]

In typst code, I can include #input.sys.some_key, and then build the document with typst build main.typ --input some_key="some value" so that this is replace with the included value (see here). It could be useful to have the ability in nvim to do something like `:TypstPreview input="some_key='some_value'" (I don't know what syntax makes sense) to be able to preview this.

The workaround right now, because input.sys is a dictionary, is just to include a default value. Eg #input.sys.at("some_key", default:"placeholder"). Counterpoint to this request is that this feature would add unnecessary complexity when this workaround is available (and probably something should be added to tinymist as well so that the editor isn't littered with errors).

[rijuyuezhu]

I use Claude Code to generate a new command :TypstPreviewInput to modify the --input key=value arguments on the fly (rijuyuezhu/typst-preview.nvim)

- `:TypstPreviewInput`:
  - Manage input fields for the Typst document:
    - `:TypstPreviewInput` (no arguments) - Show current input fields
    - `:TypstPreviewInput key1=value1 key2=value2` - Set input fields (replaces all existing values)
  - When inputs are changed, all running preview servers will automatically restart to apply the new values.
  - Input values are accessible in your Typst document via `sys.inputs`.

It seems working well.

I'm not familiar with lua (and the code Claude write), and thus do not plan to contribute the code to the upstream. If someone wants to contribute this functionality, feel free to utilize the code in my fork.