Jre detection (#54)

* initial jre detection commit

* added WinReg searching

* added windows support + refactored

* Cargo lock

* fixed linux + added canonicalization

* fixed bug in mac

* Added dunce; handling UNC paths better for canonicalization

* missed cargo lock

* removed tests, added comments

* cargo fmt

* removed redundant mac address, loop over folder

---------

Co-authored-by: Wyatt <wyatt@modrinth.com>

theseus/src/util/mod.rs

@@ -1,5 +1,6 @@
 //! Theseus utility functions
 pub mod fetch;
+pub mod jre;
 pub mod platform;
 
 /// Wrap a builder which uses a mut reference into one which outputs an owned value