As a person who believes that structure is key to organisation and trust in an app
I'd like to be able to tag my inputs with tags I make up myself
So that I can later have a better understanding of what is required from that capture at a glance and filter by the topics I am most interested in.

Tagging and projects are some of the features that I expect to most evolve as part of the app's user experience as they are the most critical but here is a starting point.

To be clear, I don't think that this will be useable as-is, but will certainly be a place to evolve from. We will have a much better UX for this within the next sprint but this is the starting point.

Acceptance Criteria

• When I edit an existing item in my list of captures items,
  I see a text field where I can input tags
• For stage 1, tags are input as a comma-separated list (a space required after each comma)
• A submit button is clicked to save them
• Each tag is checked against the saved tags (case-insensitive) and:
  • If a tag already exists, save the captures item against that tag
  • If a tag does not exist, create a new tag and save the captures item to it
  • Do not worry about leading and trailing spaces for now, this will not be the final UX MVP so we shouldn't waste time on fool-proofing for leading and trailing spaces yet - this version will only be used inside the dwyl team
• Once tags are saved, take human back to the list of captures items
• The list of tags should be displayed under the item.text
• each tag should be a clickable hyperlink
  • clicking/tapping on the tag (hyperlink) should filter the items in the current list to just those with that tag.