[Feature Request] Energy & CO2 Indicator

Description: Add an environmental impact indicator to the status bar to show the footprint of AI requests.

Proposed Metrics:

• Energy: Estimated consumption in kWh.
• CO2: Carbon footprint in mg/g CO2e.

Scientific Basis: Estimates maybe based on arXiv:2505.09598v1 :)

Calculation Logic:

• $Energy = (Tokens / 1000) \times kWh_{rate}$
• $CO2 = Energy \times Carbon_Intensity$

Example UI: [ Context: 8k | Energy: 0.01 kWh | CO2: 4.5mg ]