fix: conform to the new scopus format

[odarbelaeze]

Scopus changed the format by not providing the Abbreviated Source Title
and changing the format of the authors. We'll use the Source title field
now and the authors seem to come in initials, last name, first name
formats.

So we're going to re-format the authors as last name, initials as it
was before.

[Copilot]

Pull Request Overview

This PR updates the Scopus CSV parser to conform to format changes in Scopus data exports. Scopus has changed the column name from "Abbreviated Source Title" to "Source title" and modified the author name format from "last name, initials" to "initials, last name, first name".

• Updates field mapping to use the new "Source title" column instead of "Abbreviated Source Title"
• Adds author name reformatting function to convert from new format back to expected "last name, initials" format
• Bumps version from 0.8.0 to 0.9.0

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/bibx/sources/scopus_csv.py	Updates journal field mapping and adds author name rotation logic
src/bibx/cli.py	Adds new CSV command for testing Scopus CSV parsing
src/bibx/init.py	Version bump to 0.9.0

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