Improve the parser error type

[CosmicHorrorDev]

• feat(parser): Flesh out parser error variants
• refactor(parser): Split error into parser/renderer errors
• wip: Pretty display error info

[CosmicHorrorDev]

Ah at this point I think it'd be better to split this PR into a more minimal error overhaul which involves:

• Splitting the error into a separate parse/render error
• Returning a basic kind indicating the type of error

All the span and fancy delay stuff is finicky and can be stabilized later instead of blocking the release