feat: add more info in setWindowOpenHandler details

[nornagon]

Description of Change

This adds disposition, referrer and postBody to the details object passed to the window open handler.

Builds on #28513, which fixes a number of PostBody-related issues.

Closes #28380.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• relevant documentation is changed or added
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Added disposition, referrer and postBody to the details object passed to the window open handler registered with setWindowOpenHandler.

[nornagon]

This should perhaps be target/12-x-y too

[Prinzhorn]

Would it be possible to add the parsed features as well? Originally I opened #28377 before I realized setWindowOpenHandler was lacking additional information too.

[nornagon]

Would it be possible to add the parsed features as well? Originally I opened #28377 before I realized setWindowOpenHandler was lacking additional information too.

parsed features is a little more complicated because:

1. there's already a property called features in the details object which contains the raw features string, and
2. parsing the features currently splits the results between options, webPreferences and additionalFeatures, which isn't really a great API and I'd rather not propagate that bad API to the new method.

If it helps, the code for parsing the features isn't much more complicated than features.split(","):

electron/lib/common/parse-features-string.ts

Lines 59 to 72 in 77dcf10

	export function parseCommaSeparatedKeyValue (source: string, useSoonToBeDeprecatedBehaviorForBareKeys: boolean) {
	const bareKeys = [] as string[];
	const parsed = {} as { [key: string]: any };
	for (const keyValuePair of source.split(',')) {
	const [key, value] = keyValuePair.split('=').map(str => str.trim());
	if (useSoonToBeDeprecatedBehaviorForBareKeys && value === undefined) {
	if (key) { bareKeys.push(key); }
	continue;
	}
	parsed[key] = coerce(key, value);
	}
	return { parsed, bareKeys };
	}

[Prinzhorn]

@nornagon thanks for looking into this, I'll probably use JSON then if I can use any string. I'm in control of the features string anyway.

[release-clerk]

Release Notes Persisted

Added disposition, referrer and postBody to the details object passed to the window open handler registered with setWindowOpenHandler.

[trop]

I was unable to backport this PR to "13-x-y" cleanly;
you will need to perform this backport manually.

[trop]

@VerteDinde has manually backported this PR to "master", please check out #29276

[trop]

@VerteDinde has manually backported this PR to "13-x-y", please check out #29276

[trop]

@VerteDinde has manually backported this PR to "13-x-y", please check out #29277