[Feature]: Create custom groups for grouping lines together

[scottdykes1611]

Product

Sensabill

Is your feature request related to a problem? Please describe.

No response

Describe the solution you'd like.

• Add page to show all groups, including what lines are assigned to that group, and the dates which that group is active
• Option to create a new group
• A group can have many lines assigned to it
• One line can be assigned to many groups
• Lines can be added and removed from groups etc. etc. (e.g. assigned to this group from 01/01/2023-01/04/2023 and 01/07/2023-present)
• All reports should be filterable by group (same as cost centre)
• Groups should be shown next to each line in the overview table

Describe alternatives you've considered.

No response

Checked for existing ticket

• I confirm I have checked to see that this feature has not already been requested.
• I confirm I have not included any sensitive information.