Get ready for v1.0.0

[Boshen]

• Turn on clippy pedantic and nursery - for better code quality
• Fix the benchmark bot, it's still broken
• Have a clear boundary / api between public and private structs, make all public fields private and add accessors and setters.
• Especially for the return type Info, it should be replaced with a API struct
• Add a NormalizedPath newtype for the return types of normalize.rs trait, to make the code super clear where normalized paths are
• Make tracing an optional dependency?