Add AdcSampler & BatteryMonitor

[m-RNA]

Summary

Add AdcSampler for Monitoring component and added battery monitoring with SOC calculation.

Architecture:

+-----------------------+
|   MonitoringManager   | ← High-level coordinator
+-----------------------+
|  BatteryMonitor       | ← Battery logic (platform-independent)
|  CurrentMonitor       | ← Current logic (platform-independent)
+-----------------------+
|      AdcSampler       | ← BSP: Unified ADC sampling interface
+-----------------------+
|   ESP-IDF ADC HAL     | ← Espressif official driver
+-----------------------+

Details

BSP Layer (AdcSampler)

• Unified ADC1 oneshot sampling interface
• Platform-specific GPIO-to-channel mapping:
  • AdcSampler_esp32.cpp: GPIO32-39 → ADC1_CH0-7
  • AdcSampler_esp32s3.cpp: GPIO1-10 → ADC1_CH0-9
• Shared ADC unit initialization with curve-fitting calibration

Business Logic Layer

• BatteryMonitor: Voltage divider compensation, Li-ion SOC lookup table with linear interpolation
• CurrentMonitor: Shunt-based current calculation with gain compensation
• Both are delegate hardware access to AdcSampler

Coordinator Layer (MonitoringManager)

• Caches BatteryStatus (voltage + percentage + validity) directly
• Schedules LED current and battery sampling with configurable periods
• Thread-safe access via mutex for BatteryStatus

Command Layer

• Add getBatteryStatusCommand()

MenuConfig

Testing

Platform	Board	ADC Pins	Result
ESP32-S3	wrooms3QIO	Pin 1 & Pin 3	PASS
ESP32	esp32AIThinker	Pin 32 & Pin 33	PASS

• CONFIG_MONITORING_LED_CURRENT=y
• CONFIG_MONITORING_BATTERY_ENABLE=y

🔧 OpenIris Setup Tool
==================================================
📡 Connecting directly to COMX...
✅ Connected to the device on COMX
 1  📶 WiFi settings
 2  🌐 Configure MDNS
 3  💻 Configure UVC Name
 4  🚀 Start streaming mode
 5  🔄 Switch device mode (WiFi/UVC/Auto)
 6  💡 Update PWM Duty Cycle
 7  🧩 Get settings summary
 8  🔪 Restart device
[Back] To go back
>> 7
--------------------------------------------------
🧩 Collecting device settings...

🔑 Serial: xxx
💡 LED PWM Duty: 100%
🎚️  Mode: wifi
🔌 LED Current: 0.091 mA
🔋 Battery: 4388.00 mV | 100.0 %
📛 Name: openiristracker
🏷️  Device: OpenIris
🧭 Version: 0.2.1rc0
📶 WiFi: connecting  |  IP: -  |  Networks configured: 0

[m-RNA]

@lorow This Pr is ready for review.

[lorow]

Honestly I like the changes!

Thanks for bringing in the battery monitoring and expanding what we already had with the current monitor! Though, I'm on the verge with checking for esp32s3 || esp32 since those are the only two platforms we support (and stuff from s2 should work under s3 iirc, if we even have a board like that) but it doesn't hurt or obscure the logic anyway so I didn't point it out in the review. Heck, I may be wrong here for all I know!

Thanks for giving it a go on both - the wrooms and esp32cams btw!

I'll go ahead and merge the changes

[m-RNA]

You're right — platform-specific logic like ADC calibration and pin mappings really should live in separate files rather than being tangled together with macros. It’s cleaner and makes future porting much simpler.