common : init in params parser, add Windows UTF-8 support

[angt]

Overview

Simplify the common init process and fix windows logging

Additional information

We already call common_params_parse() first, then common_init(), so this adjusts the code to call common_init() first (directly from common_params_parse).

The build info is now only for debug, so we avoid the duplicate with --version.

The UTF-8 setup at the beginning is needed to avoid logging garbage on Windows.

Requirements

• I have read and agree with the contributing guidelines
• AI usage disclosure: NO

[angt]

On windows, without the patch:

PS Z:\>  C:\Users\angt\installama\server.exe -hf angt/modelutf8
common_download_file_single_online: no previous model file found C:\Users\angt\AppData\Local\llama.cpp\angt_modelutf8_preset.ini
common_download_file_single_online: HEAD failed, status: 404
no remote preset found, skipping
common_download_file_single_online: no previous model file found C:\Users\angt\.cache\huggingface\hub\models--angt--modelutf8\blobs\bd258782e35f7f458f8aced1adc053e6e92e89bc735ba3be89d38a06121dc517
common_download_file_single_online: downloading from https://huggingface.co/angt/modelutf8/resolve/85ca32e076fd0d1f3817a2cbc78cb34ebae46459/Mödèle_🚀_测试_اختبار_Тест-Q4_K_M.gguf to