Performance study

### 📝 Description of the feature

A series of performance study should be created and ran so we can document the boundary conditions for remote rendering vs. client configuration of Theia

### Acceptance Criteria

The performance studies have been performed. There are scripts available to reproduce them.
The results and the boundary conditions are documented in such a way any user can access them.

### 💵 Business Value

Provide users with an easy way to determine which configuration should be used in their particular scenario.

### 🔗 Useful links and references

_No response_

No files, tests, or entry points are named. Start by locating the remote-rendering and client-configuration entry points and any existing scripts, then define reproducible performance studies for both paths; done means the studies run successfully, their scripts are available, and the results and boundary conditions are documented for users.

索引モデルが issue の本文から書いたものです。