Rogallo v0.9.0

I've released v0.9.0 of Rogallo. The first big change in this release is the addition of syntax highlighting to pre-formatted text.

Much like in Markdown, Gemtext also supports pre-formatted text bounded by code fences. Gemtext supports the concept of "alt-text" for such text, like this:

```python
def hello(name: str = "World") -> str:
    return f"Hello, {name}!"
```

Until now Rogallo would simply show the text as-is (with some styling to make it stand out from normal paragraphs). From this release, if there is alt-text for the pre-formatted block, and if it's the name of a supported language, the content will have syntax highlighting applied.

If you're curious which languages are supported, it should be anything that Pygments supports.

Another significant change is to the user input dialog. As mentioned in an earlier post, the Gemini protocol imposes limits on how much text can be submitted to a capsule. As documented, the limit is for a resulting URI of 1024 bytes¹. To save someone typing out a long entry, only to have it lost², I've added a count of how much input is left available (calculated from the size of the URI that would result):

To help ensure that the user doesn't submit too much, I've also added an error display if you go over the limit, which also refuses to submit the input.

With these in place it should be a lot harder to run into an unexpected loss of input.

One final tweak is a small change to the optional link stripe system I recently added. While playing around with some other themes, I noticed that the styling didn't show up well, or at all, in many of them. So I've changed it a little so it now shows in all available themes. I'm still not convinced it's quite right -- I'll play some more. But at least now it's visible in all cases.