Amazing error handling

[catmcgee]

[do not pick up yet]

Create GillError type GillError { code, message, hints[], cause? }

wrap everything in try/catch and return GillError

All current errors should be migrated to this error type

support IDL custom error decoding

Error codes -> docs (/errors/<error-code>) (you do not have to write the docs in this issue, but ensure the page exists and is being linked)

[tobeycodes]

@catmcgee is this a duplicate of #273?

[AlphaR2]

This is like a child of it. You cannot do this without that GillError. I think it should be same now cause:

1. To achieve the plan we have in mind, we will be creating the error codes which will cover all the Errors native to Gill (Error codes -> docs (/errors/) (you do not have to write the docs in this issue, but ensure the page exists and is being linked))
2. We ideally need to wrap errors in try /catch and return GillError

[catmcgee]

@tobeycodes ^ what @AlphaR2 said. but makes sense to handle in same issue. closed other issue