fix(cli): Remove crypto module from @fern-api/ir-generator

[amckinney]

This removes the crypto module from the @fern-api/ir-generator package, as well as the following other edits:

1. Update @fern-api/path-utils to omit the conditional path import, which is incompatible in some environments.
2. Update the hashJSON function without the crypto module, which is used to generate example IDs in the IR.
   • Note that the IDs generated in the @fern-api/docs-resolver are unaffected given that this module doesn't need to be browser compatible.
3. Add a build.cjs setup for the @fern-api/ir-generator package, which is used in test environments.
4. Incorporate the changes to remove the dependency on @redocly-openapi-core from fix(cli): Remove @redocly/openapi-core from browser workspace #5359.