publish v0.8.0

[saying121]

Added

• shell completion run lcode --generate <zsh|bash|...>

Changed

• reqwest feature from gzip to brotli.
• lcode-config: change dir name form "leetcode-cn-en-cli" to "lcode".
• Not auto generate config files, run lcode gencon generate default config.

migration to v0.8.0

# linux
cp -r ~/.config/leetcode-cn-en-cli ~/.config/lcode
cp -r ~/.cache/leetcode-cn-en-cli ~/.cache/lcode
# macos
cp -r ~/.config/leetcode-cn-en-cli ~/.config/lcode
cp -r ~/Library/Caches/leetcode-cn-en-cli ~/Library/Caches/lcode