import/export directives ignored when not at the start of line

When debugging problems with unresolved import paths, it turned out that parsing import directives is triggered only when the directive actually starts the line:

JsFileRegexParser:347 (in version 20220601)

```
if (line.startsWith("import") || line.startsWith("export")) {
```

If you put whitespace before the import directive, it is just ignored.

Not sure if this is correct and/or intentional, in any case it is rather unexpected.

Start at JsFileRegexParser:347 in the version cited by the issue and inspect how import and export directives are recognized. Check the surrounding parsing behavior for leading whitespace and determine the intended handling from existing tests or conventions. Done means the behavior for indented directives is explicitly covered and matches the project's intended parsing rules.

Written by the indexing model from the issue text.