Dev

[anarchyysm]

Description

This PR merges the dev branch into main, bringing in a large batch of new features, fixes, and infrastructure changes developed since the last release.

Major additions:

• LoRa stack: Meshtastic protocol, RNode/Reticulum protocol, MeshCore companion protocol, all with SPI transport between P4 (radio) and C5 (phone)
• RFID: 17 protocol decoders (EM4100, HID, Indala, Gallagher, FDX-B, and more) with NVS card storage
• SX1262 LoRa driver
• NFC key dictionary loaded from SD card
• SPI bridge session lifecycle and centralized timeouts
• C5 flasher: SYNC handshake, 921600 baud, ACK flow control
• Button press logging with name and GPIO
• sdkconfig.defaults for both firmwares; sdkconfig and sdkconfig.old removed from version control
• License migrated from Apache 2.0 to GNU General Public License v3.0

Related Issue: N/A

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING.md document.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings during build.
• I have tested this change on physical hardware. (Please specify which target below)

Hardware Testing Details

• Target: ESP32-C5 (firmware_c5) + ESP32-P4 (firmware_p4)
• Environment: ESP-IDF v5.5.3
• Test Result: Both firmwares build and boot successfully; SPI bridge, buttons, BLE, and LoRa features validated on device.

[github-actions]

🎉 This PR is included in version 1.3.0 🎉

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