v0.1.4

Update：

1. Add Community website entry, users can share and download bots from our community.
2. Install new bots with one click.
3. Support more configures in knowledge creation, like top-k, chunk size and overlap size.
4. Support more file types: pdf, docx, markdown, csv, txt, yaml, json, etc.
5. Change startup bots for users' quick start.

Macos silicon（M1 and above）：argo-0.1.4-osx-installer.dmg
Windows 64bit（win 10 and above）：argo-0.1.4-windows-x64-installer.exe