Perf: Better cache hit for `std::fs::canonicalize` and `std::fs::metadata`

[Boshen]

Both std::fs::canonicalize and std::fs::metadata are slow syscalls as they need to follow and resolve symlinks.

We can probably avoid a lot of these calls by normalizing and caching as much as possible.

For example, std::fs::metadata is currently being called with such paths:

"/benchcases/three/src/copy1/./math/Color.js"
"/benchcases/three/src/copy1/core/../math/Color.js"
"/benchcases/three/src/copy1/extras/core/../../math/Color.js"
"/benchcases/three/src/copy1/helpers/../math/Color.js"
"/benchcases/three/src/copy1/lights/../math/Color.js"
"/benchcases/three/src/copy1/loaders/../math/Color.js"
"/benchcases/three/src/copy1/materials/../math/Color.js"
"/benchcases/three/src/copy1/renderers/shaders/../../math/Color.js"
"/benchcases/three/src/copy1/renderers/webgl/../../math/Color.js"
"/benchcases/three/src/copy1/scenes/../math/Color.js"

But only 1 call should exist because we can normalize and cache these paths prior to the call.

std::fs::canonicalize will be harder to cache and normalize, but should be doable ;-)

[Boshen]

Evidence of slowness:

[Boshen]

We should port https://github.com/webpack/enhanced-resolve/blob/main/lib/SymlinkPlugin.js

[Boshen]

#125 is only half way there, more work needs to be done in order to remove std::fs::canonicalize inside the symlink plugin.