Import function only works for limited formats

[Cynid-22]

Problem

The import function in the repository does not support a universal range of formats. Currently, it only accepts certain formats, which results in incompatibility for users with other types of authenticator data files. This limitation causes import failures or requires manual format conversion prior to importing.

Steps to reproduce

1. Attempt to import an authenticator file in a non-supported format.
2. Observe the error or failure message.
3. Try different formats to see which ones succeed.

Expected behavior

Imports should work for any commonly used authenticator format, or at least provide clear guidance and support for more formats.

Impact

Users with data from other authenticator apps or sources may not be able to import their setup easily.

Suggested improvements

• Expand the range of supported import formats.
• Add documentation specifying which formats are compatible.
• Implement clear error messages and guidance when import fails due to format issues.