Add UTF-8 support, Password Reset Utility and Environment Diagnostics

[rapekas]

Summary

This PR adds two utilities: a root password reset script (reset_password.py) and a diagnostic test (test.py) for the XMiR Patcher environment.

Also adds UTF-8 encoding support in file read/write operations to ensure reliable handling of non-ASCII characters across different systems (fixes potential UnicodeDecodeError on non-English locales).

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Changes

1. reset_password.py — Root Password Reset

Script to reset a forgotten root password via SSH or TELNET.

Behavior:

• Tries SSH first (if a password exists in memcfg)

• Falls back to TELNET (default password: root) when SSH is not usable

• Sets a new root password and checks SSH access with it

• Optional --ip flag to target a specific device IP

Usage:

./run.sh reset_password.py [new_password]

./run.sh reset_password.py --ip 192.168.31.1 new_password

Dependencies:

• Device on the same network

• SSH (with known password) or TELNET (telnet_en=1)

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2. test.py — Environment Diagnostics

Script to verify XMiR Patcher setup, imports, config, and device reachability.

Checks:

• [1] Imports — xmir_base, gateway, xqmodel, read_info

• [2] Configuration — Gateway init, IP, SSH port, memcfg password

• [3] Device discovery — Detection of Xiaomi device on the network

• [4] Supported models — Lists known models (R3G, R3P, RM2100, R4A, WR30, etc.)

• [5] Unsupported models — Notes that BE3600, BE2600, and other Wi‑Fi 7 (BE) devices use Qualcomm IPQ (ARM) instead of MediaTek MT7621 (MIPS), so Breed bootloader and some features are not supported

Usage:

./run.sh test.py

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Testing

Both scripts use the existing gateway and xmir_base modules and are intended to run via ./run.sh.

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Motivation

• reset_password.py — Provides a simple way to recover root access when the password is lost, using SSH or TELNET.

• test.py — Helps users quickly verify their environment and avoid common setup issues.