fix: reject promise on child error

[AllanChain]

Fixes #10107

If there is an error in the child iframe beforeunload, the promise will never resolve, making us wait infinitely. Therefore, the try{}catch{} block is not working as expected:

logseq/libs/src/LSPlugin.core.ts

Lines 920 to 928 in 361d08d

	try {
	await this._caller?.callUserModel(
	AWAIT_LSPMSGFn(LSPMSG_BEFORE_UNLOAD),
	eventBeforeUnload
	)
	this.emit('beforeunload', eventBeforeUnload)
	} catch (e) {
	this.logger.error('[beforeunload Error]', e)
	}

This PR rejects child promise on error so that the try{}catch{} block is catching the error.

To test it, follow #10107 but change @logseq/libs to the development one.

One question, should I update LSPlugin.core.js in this PR?

[xyhp915]

One question, should I update LSPlugin.core.js in this PR?

@AllanChain Awesome works! You shouldn't do that. It will be built with the next plugin SDK release ;-)

[xyhp915]

LGTM.