fix(go): enforce battery thermal protection

[samuelbles07]

Summary

Enforce the AirGradient Go battery operating-temperature policy to prevent charging or discharging outside safe limits and show the correct shutdown warning for hot and cold conditions.

Changes

• Configure and verify the BQ25629 NTC and OTG thermal profile during initialization.
• Limit charging to 0–45 °C with 2–43 °C recovery hysteresis, and disable charging for invalid NTC readings.
• Request protective shutdown outside the -10–60 °C discharge range in interactive and Offline paths.
• Add distinct hot and cold shutdown screens while retaining the legacy BLE overheat reason for compatibility.
• Update Go battery, display, orchestrator, and BLE documentation.

Validation

• Host test suite passed: 1288/1288.
• idf.py -C products/go build passed.
• git diff --check and Markdown lint passed.

[mattMRBH]

1. In Line 419-420: Why did "hysteresis" decrease from 3C to 2C for hot and cold recovery?

2. In Line 421: DISCHARGE_MIN_TEMPERATURE_C set to -10C? The AG Go's operating temperature on the manual is down to -20C, and while I don't have any hardware documentation at this point, I feel like the cell being used is a PKCELL LIPO785060 2500 mAh 3.7Vdc(nom) cell, which also supports discharge down to -20C, unless another component in the design sets this limit.

3. In Line 413: EDV_SHIP_THRESHOLD_V = 2.9f. This should be set to 3.0f as the discharge cutoff voltage for the PKCELL is 3.0 Vdc.

If a different cell is being used with different specifications, please accept my apologies as I didn't want to pull the cell off my brand-new AG Go, just yet... :)