Create front-end visualisation and controls for MEDUSA model

[LukeParky]

This work involves creating the UI for sending requests for modelling, as well as the visualisation of the outputs.

• [ ] As a water scientist, I want to be able to model a rainfall event based on configurable parameters and identify sources and quantities of pollutants associated with the event. This will be a separate modelling mode than flood modelling.
• [ ] Data should be outputted as spatial vector layers detailing sources of pollutants and their contributing pollutant loads.
• [ ] As a water scientist, I want to be able to adjust inputs to pollutant modelling, such that I can use the tool to model bounds for uncertainties in my modelling.

Blocked by #161 #160

[github-actions[bot]]

Status: Blocked :x:

Issues blocking this PR:

• 161 :x:

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