Duplicate all project functionality under instances

[Pezmc]

Merge target is the feature branch for application instances as part of #1689: feat-1689-application-instances

Description

Duplicates almost all front end projects functionality, under /instances

• The majority of these files are a naive copy and paste, with fixes for linting errors, and some find and replace for s/Project/Instance/.
• Instances can be navigated to from the Project > Instances table (which only contains one entry for now)

This branch was rapidly becoming unwieldy, so I'm opening a PR now at a sensible pausing point, before continuing the work of #1718.

Next up:

• Removing functionality from Projects that should remain exclusively under Instances
• Removing functionality from this duplicate Instances that should remain under Projects (and move to Application at a later date)

Screen.Recording.2023-03-02.at.18.15.24.mov

Related Issue(s)

#1718

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• [-] Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• [-] Changes flowforge.yml?
  • Issue/PR raised on flowforge/helm to update ConfigMap Template
  • Issue/PR raised on flowforge/CloudProject to update values for Staging/Production

Labels

• [-] Backport needed? -> add the backport label
• [-] Includes a DB migration? -> add the area:migration label