When using Gemini, I noticed that some tokens (such as reasoning tokens and usage by modality) were not being collected. I made an adjustment so that all of these are included within the Usagedetails.

Since details is a dict fromstr toint, I couldn't simply throw them in there, so I created the dict in what I thought was the most intuitive way, but I'm not sure if it's the best approach.

I also had to add line breaks in this CLI test to make it pass on my PC (not sure why), but after pushing I saw that it broke the tests, so I removed them again :D

Now, every token documented here:https://ai.google.dev/api/generate-content#UsageMetadata is collected.

Also, when streaming, I'm retrieving usage data only from the last chunk and this shouldfix#1736