[Feature] Tags - Step 1

[cielf]

Summary

Add tags for Product Drives

Why

We want to add tags as a feature, to allow for flexible searches. Basically for anything that would have simple textual attributes that don't feed into reporting.
This adds a flexible search for the banks -- could be used for campaigns for product drives, or broad partner categories or...

This issue is for step 1 - adding tagging for product drives, which will allow banks to, for instance, group them by campaigns (like Mother's Day or Thanksgiving or Back to School or...)

Details

• Add the ability to tag product drives. In a manner that will be expandable to tagging other entities.
• When adding a tag, the current tags should be shown for selection, but another can be specified.
• Add tagging to the product drive search.
• tags are organization-specific
• tagging entity will have (tag name, org id), entity type and entity id
• the tagging filtration will show the tags for that kind of thing (in this case product drives) for that organization

hints

select2 has a tag entry mode
let's not get a new gem

Criteria for completion

• tag feature in place for product drives, including addition, removal, and filtering
• automated tests demonstrating the feature on product drives.
• update user guide for product drives to cover tagging

[MichaScant]

Hey, can I be assigned this issue please?

[cielf]

Hey @MichaScant -- see my note on #4817. If no one else has picked this up when that one's done, please feel free to ping again, and I'll assign you.