Support datetime format for triggers of valarm

[AustinZhang1024]

The problem

Support trigger like this:

BEGIN:VALARM
TRIGGER:20250114T133635Z
ACTION:DISPLAY
DESCRIPTION:On time reminder
END:VALARM

It reports Error: invalid duration value: Not enough duration components in "133635Z"

Related issue: #120
Related code:

GAS-ICS-Sync/Helpers.gs

Line 796 in e0f8c14

var trigger = valarm.getFirstPropertyValue('trigger').toString();

GAS-ICS-Sync/ical.js.gs

Lines 715 to 730 in e0f8c14

	value: function fromString(aStr) {
	var pos = 0;
	var dict = Object.create(null);
	var chunks = 0;
	while ((pos = aStr.search(DURATION_LETTERS)) !== -1) {
	var type = aStr[pos];
	var numeric = aStr.slice(0, Math.max(0, pos));
	aStr = aStr.slice(pos + 1);
	chunks += parseDurationChunk(type, numeric, dict);
	}
	if (chunks < 2) {
	// There must be at least a chunk with "P" and some unit chunk
	throw new Error('invalid duration value: Not enough duration components in "' + aStr + '"');
	}
	return new Duration(dict);
	}

Version of GAS-ICS-Sync

5.8

Additional information & file uploads

No response