feat(jans-tarp): refactor jans-tarp project to make it strongly-typed and maintainable

When developing Tarp, we tried to keep the code minimalistic since it is a browser extension and we didn’t want to occupy too much browser storage.
However, over time we have added new features to Tarp, such as Cedarling authorization and AI agents.
Therefore, this is the right time to make the following improvements in Tarp.

- Make the code strongly typed
- Structurize the project

```
.
└── src /
├── ai/
│ ├── ui
│ ├── helper
│ ├── service
│ └── hooks
├── cedarling/
│ ├── ui
│ ├── helper
│ ├── service
│ └── hooks
└── oidc/
├── ui
├── helper
├── service
└── hooks
```