Std extension exec tests

[f3l1x98]

Closes #416
Note: This PR also includes #462 due to required functionality!

This PR adds tests to all the block-executors of the std extension (and also the file-util.ts).

[f3l1x98]

I have found a few parts where I either already adjusted parts or think need adjustments. These are the ones I have thus far:

Adjusted

1. File picker file not found.
   I have added handling in case the file was not found, because otherwise the assert(file instance of BinaryFile) would have triggered a vague error:
   

   jayvee/libs/extensions/std/exec/src/file-picker-executor.ts

   Lines 35 to 41 in c853d30

   	const file = fileSystem.getFile(path);
   	if (file == null) {
   	return R.err({
   	message: `File '${path}' not found`,
   	diagnostic: { node: context.getCurrentNode() },
   	});
   	}

2. Gtfs interpreter interpret error.
   I have added a try catch to return a better error message in case the gtfs decode fails:
   

   jayvee/libs/extensions/std/exec/src/gtfs-rt-interpreter-executor.ts

   Lines 38 to 50 in c853d30

   	let feedMessage;
   	try {
   	feedMessage = GtfsRealtimeBindings.transit_realtime.FeedMessage.decode(
   	new Uint8Array(inputFile.content),
   	);
   	} catch (e) {
   	return Promise.resolve(
   	R.err({
   	message: `Failed to decode gtfs file: ${this.getErrorMessage(e)}`,
   	diagnostic: { node: context.getCurrentNode() },
   	}),
   	);
   	}

Require adjustments

1. File utils method naming.
   I am not 100% sure, but I think the parameter is named wrong and should be contentType: string.
   Alternatively the name of the method should be inferMimeTypeFromFileExtensionString if I misunderstood the method itself:
   

   jayvee/libs/extensions/std/exec/src/file-util.ts

   Lines 8 to 18 in c853d30

   	export function inferMimeTypeFromContentTypeString(
   	fileExtension: string | undefined,
   	): MimeType | undefined {
   	if (fileExtension !== undefined) {
   	const inferredMimeType = mime.lookup(fileExtension) as MimeType;
   	if (Object.values(MimeType).includes(inferredMimeType)) {
   	return inferredMimeType;
   	}
   	}
   	return undefined;
   	}

[georg-schwarz]

Nice!

[georg-schwarz]

1. File utils method naming.
   I am not 100% sure, but I think the parameter is named wrong and should be contentType: string.
   Alternatively the name of the method should be inferMimeTypeFromFileExtensionString if I misunderstood the method itself:
   

   jayvee/libs/extensions/std/exec/src/file-util.ts

   Lines 8 to 18 in c853d30

   	export function inferMimeTypeFromContentTypeString(
   	fileExtension: string | undefined,
   	): MimeType | undefined {
   	if (fileExtension !== undefined) {
   	const inferredMimeType = mime.lookup(fileExtension) as MimeType;
   	if (Object.values(MimeType).includes(inferredMimeType)) {
   	return inferredMimeType;
   	}
   	}
   	return undefined;
   	}

From what I saw the method infers the mime type from the filename ending (e.g., .txt, .pdf). So the method name is misleading, good catch! Should be inferMimeTypeFromFileExtension instead.