[util] add fetch_config.sh to download and decrypt nightly release configs

[docs] compress CLAUDE.md to <100 lines for context efficiency

[docs] sync CLAUDE.md with current codebase state

[ci] add mypy type check job to nightly workflow

[typing] add type hints with Python 3.12+ syntax and mypy config

[fix] package secrets.yaml in common for regular installs

[ci] replace requirements.txt with pip package install

[refactor] cleanup unused files and distribute tooling configs

[refactor] package common and conf-gen as pip-installable modules

[doc] bump openwrt stable version to 24.10.5

[openwrt] upgrade stable to version 24.10.5

[conf-gen] fix DoH sing-box config

[conf-gen] split sing-box filters to non-resolve and resolve groups and place resolve action in between

[conf-gen] add normal custom proxies and fix quantmult-x conf gen

[conf-gen] use str type for westdigit url params