Excalidraw: Add anonymous google analytics events for user's actions

[lipis]

It will help us possibly update the UI and adjusted based on the results.

https://support.google.com/analytics/answer/1033068?hl=en

_Please update this List accordingly if you like._

| Category | Action | Label | Value | Description |
| ---------- | ------------ | -------------- | :---: | ----------------------- |
| General | Load | JSON | 1 | When user click Load |
| General | Save | JSON | 1 | When user clicks Save |
| General | Export | Dialog | 1 | When user clicks Export |
| General | Reset | Canvas | 1 | Reset the canvas |
| General | Background | {ColorName} | 1 | Reset the canvas |
| General | Zoom | Zoom In | 1 | |
| General | Zoom Out | Zoom Out | 1 | |
| General | Zoom Reset | Zoom Reset | 1 | |
| Export | File | PNG | 1 | |
| Export | File | SVG | 1 | |
| Export | Clipboard | JSON | 1 | |
| Export | Shareable | Link | 1 | |
| Properties | Stroke | {ColorName} | 1 | |
| Properties | Background | {ColorName} | 1 | |
| Properties | Fill | {FillType} | 1 | |
| Properties | Stroke Width | {StrokeWidth} | 1 | |
| Properties | Sloppiness | {Sloppiness} | 1 | |
| Properties | Opacity | {Opacity} | 1 | |
| Main | Selection | Select | 1 | |
| Main | Rectangle | Select | 1 | |
| Main | Diamond | Select | 1 | |
| Main | Ellipse | Select | 1 | |
| Main | Arrow | Select | 1 | |
| Main | Line | Select | 1 | |
| Main | Text | Select | 1 | |
| Main | Lock | Select | 1 | |
| Locale | Language | {LanguageCode} | 1 | |

[vjeux]

Honestly, I don't know what we would do differently based on this data. I'd rather not collect it in order to help with our story around privacy.

[kbariotis]

@vjeux well privacy is one thing for sure and monitoring is another and it depends on where we draw the line.

The events above can help us identify the most used actions by users.

A use case could be monitoring the average local storage size. Based on the number we can take a decision on https://github.com/excalidraw/excalidraw/issues/1543 and on https://github.com/excalidraw/excalidraw/issues/1280.

Also monitoring the average number of collaborators/latency could help us understand where we have performance issues and whether they critical or not.

[vjeux]

I'm open to adding monitoring in order to answer specific questions. You seem to have a concrete use case where average local storage size and collaboration count vs latency would be useful, so this is fine. This original issue was about adding blanket list of logging without clear use cases.