fix(externalIds): handle package-url stored as JSON array string

[bibhuti230185]

Summary

Old SW360 backend stored multiple package-url values as a single JSON array string (e.g., ["pkg:maven/...", "pkg:npm/..."]). The new UI could not properly display, edit, or save these entries.

Problem

• Display showed the raw JSON array string instead of individual URLs
• Edit mode showed a single row with the entire array as the value
• Adding a new package-url would overwrite all existing values (Map.set behavior)

Solution

Modified 3 files to handle the JSON array format:

File	Change
src/utils/common.utils.ts	convertObjectToMap() now expands package-url JSON arrays into multiple entries when reading
src/components/sw360/AddKeyValue/AddKeyValue.tsx	Added convertListToMap() that merges multiple package-url entries back into JSON array when saving
src/components/ExternalIds/ExternalIds.tsx	Added expandExternalIds() to display each package URL on its own line

Testing

• Created test component with package-url: ["pkg:maven/org.apache.commons/[email protected]","pkg:npm/@angular/[email protected]"]
• Verified display shows 2 separate entries
• Verified edit mode shows 2 editable rows
• Verified saving preserves JSON array format for backend compatibility

Edge Cases Handled

• Empty JSON array [] - no entries created
• Invalid JSON - falls back to displaying as-is
• Leading whitespace - handled with trimStart()
• Empty values on save - skipped