More friendly PageFrontMatter deserialize error messages

[wdv4758h]

Bug Report

Environment

Zola version: 0.13.0

Expected Behavior

With some bad metdata for the page, we will get panic messages when doing deserialize for PageFrontMatter. The messages are kind of helpful but not in a way that's friendly.

It will be great to have some suggestion like the Rust compiler has.
Like:

--> file.md:2:9
  |
1 | +++
2 | draft = ture
  |         ^^^^ help: this could be a typo, a similar value exists: `true`

This might be a fair amount of work, but I think friendly error messages is valuable. It will be good to in the roadmap.

Current Behavior

For example, the draft field should be bool, but if you somehow have typo that having draft = ture in the file. Then you will get messages like:

thread 'main' panicked at 'error deserialising page: Error { kind: Msg("Error when parsing front matter of page `/path/to/that/file.md`"), source: Some(Error { kind: Toml(Error { inner: ErrorInner { kind: UnquotedString, line: Some(1), col: 8, at: Some(9), message: "", key: [] } }), source: None }) }', components/site/src/lib.rs:264:22

It does tell which file has the problem, but the error messages say UnquotedString.

Step to reproduce

1. write draft = ture instead of draft = true to a page
2. ask zola to build it

---

Still wanna say thank you, I enjoy using Zola :)

[Keats]

Hmm it shouldn't be a panic but we're depending on toml-rs error handling there.

[Keats]

The panic is fixed but the error message I'm not too sure.

[wdv4758h]

I think that will be good enough for now :)

[wdv4758h]

I just see this library. It seems related to friendly error messages.
https://github.com/AlexanderThaller/format_serde_error

[Keats]

Oooh that's nice. It seems a bit early to use it but it's promising

[wdv4758h]

agree, that's wait and see :)