0.10.3

This was originally supposed to be version 1.0.0, but I don't feel confident enough in the stability to call it that.

Highlights:

• rga is now configurable via a config file (~/.config/ripgrep-all/config.jsonc) that is generated on first use, including schema.
• Custom subprocess-spawning adapters can be defined via config file. See https://github.com/phiresky/ripgrep-all/wiki
• External adapters can be shared with the community at https://github.com/phiresky/ripgrep-all/discussions

Others:

• cache database is now sqlite for inspectability and robustness
• mbox adapter (@FliegendeWurst #104)
• auto generate parts of the readme
• add loads of debug logs and performance timings when --debug is used
• better error messages via anyhow
• add cross-platform rga-fzf binary
• change whole code base to be async
• change adapter interface from (&Read, &Write) -> () to AsyncRead -> AsyncRead to allow chaining of adapters