Projectview parsing should be more resilient

[agluszak]

Description of the bug:

Currently it's not possible to share .projectviews between this plugin and Hirschgarten, because Hirschgarten supports more projectview attributes. This plugin refuses to use projectviews with unsupported attributes.

Which category does this issue belong to?

No response

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Which Intellij IDE are you using? Please provide the specific version.

No response

What programming languages and tools are you using? Please provide specific versions.

No response

What Bazel plugin version are you using?

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response

[tpasternak]

So I think we can maintain a list of Hirschgarten attributes to ignore, but I would prefer to keep the checks strict, as we should catch typos and mistakes