Yanmaga: Fix error handling and restore _getMangaFromURI

[clfws9]

If a user tries to download a chapter that requires rental or login, an exception is thrown in the _getPageList function.
However, because the exception is not handled, there is no indication in the UI that the download has failed.
I have fixed this by handling the exception.

Also, since switching from ComiciViewer to SpeedBinb (e93e7c1), copy and paste support seems to be broken.
I have restored the _getMangaFromURI function from the following part.

hakuneko/src/web/mjs/connectors/Yanmaga.mjs

Lines 23 to 29 in 5f8979d

	async _getMangaFromURI(uri) {
	const request = new Request(uri);
	const [data] = await this.fetchDOM(request, '.detailv2-outline-title');
	const id = uri.pathname;
	const title = data.textContent.trim();
	return new Manga(this, id, title);
	}