Interactively probing data

### User Story Description

As a user, I want to probe interactively the model so I can see the values of variables at specific points.

The probe will display the X,Y,Z position and the value of the variable the part is currently colored by. We will display the nearest data available (no need to interpolate the nearest nodes).
When probing a vector variable, the probe will return the magnitude of the variable.

Here links to UI proposals:

Prototype link: https://www.figma.com/proto/fh0pQYoi8n88rB3Xtx5QGl/Theia-3D-Viewer?page-id=58279%3A20202&node-id=58279-32750&viewport=701%2C268%2C0.24&t=dBfDvEJAtvlEN8mH-1&scaling=min-zoom&content-scaling=fixed&starting-point-node-id=58279%3A32750

Documentation/Slides: https://www.figma.com/slides/K31bZ6YPOhV4JG7jIk6Bzc/Theia-Interactive-Probe-Feature-Doc?node-id=1-42&t=IW44F1Snbz363qJX-0

### Acceptance Criteria

Start a session of VISOR. Load a model. Color a part by a variable.

Probe the part. On the rendering window, the X,Y,Z values and variable values will appear.

Repeat with a vector variable. The probe returns the magnitude of the vector.

Now, make the part with a constant color - no color by variable. Probe a point again. The probe returns X,Y,Z but no variable value.

### Additional Links

_No response_

### Requires new or update to third party ? If "yes" add the name(s) and the version(s) of the Third Party Software.

No

### Name and Version for Third Parties

_No response_

從 VISOR 渲染視窗開始，查看連結的 Figma 原型和功能文件，以了解提議的互動。在實作探針行為之前，確認已載入模型及其目前著色變數的呈現方式。對於純量、向量和常數色彩部分，包括 X,Y,Z 的顯示和向量大小的處理，驗收標準均通過後即可視為完成。

由索引模型根據 Issue 內容生成。