feat: Add description to ICS events

[DoomHammer]

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[reinhrst]

Sooo, gut feeling says that this will be an issue if the description contains any non-ascii characters. Good thing that Polish hardly uses non-ascii :|. Also supposedly = should be escaped as well.

So other Claude suggests some fixes, although as always with AI it may be good to check if they make sense / are better / if it's actually broken now:

ClaudeAI:

Better Solutions

Option 1: Simple iCal escaping (recommended)

Drop QUOTED-PRINTABLE and use standard iCal escaping instead:

DESCRIPTION:{{ $event.page.Content | replaceRE `\\` `\\\\` | replaceRE `;` `\;` | replaceRE `,` `\,` | replaceRE `\n` `\n ` }}

This escapes backslashes, semicolons, commas, and folds newlines (iCal uses space-prefixed continuation lines).

Option 2: Proper Quoted-Printable (complex)

Hugo doesn't have built-in QP encoding, so you'd need to create a custom shortcode or use a pre-processing step with a tool that properly encodes QP.

Option 3: Plain text with basic escaping

DESCRIPTION:{{ $event.page.Content | plainify | replaceRE `\n` `\\n` }}

The plainify removes HTML, and \\n is the iCal escape sequence for newlines.

I'd recommend Option 1 or 3 depending on whether you need to preserve HTML formatting or not. Both handle Unicode properly without additional encoding.

[DoomHammer]

Yeah, I can already see that different implementations might have different ways of parsing this.

It's a first step, though!