documentation: Pi Agent example has thinking modes wrong

[lesinigo]

The README says:

DeepSeek V4 Flash has distinct non-thinking, thinking, and Think Max modes.

The same README has this in the Pi Agent configuration example:

          "thinkingLevelMap": {
            "off": null,
            "minimal": "low",
            "low": "low",
            "medium": "medium",
            "high": "high",
            "xhigh": "xhigh"
          },

Assuming the non-thinking, thinking, thinkmax is right, there are these problems in the Pi example:

• "off": null one means "off is not supported, do not present it to the user", effectively masking the non-thinking mode from the users
• minimal trough xhigh are actually all mapped to "Thinking" by the model
• max is masked from the users

I have not yet been able to test it against ds4, but this mapping is more in line with the declared thinking modes:

          "thinkingLevelMap": {
            "off": "off",
            "minimal": null,
            "low": null,
            "medium": null,
            "high": "high",
            "xhigh": null,
            "max": "max"
          },

[kmike]

See also (related): #704

[paride-cmd]

Picking this up — will fix the Pi Agent thinkingLevelMap example in the README to match DeepSeek V4 Flash's non-thinking / thinking / Think Max modes.