Fixes#306 adding command line autocompletion. These are generated to: CARGO_TARGET_DIR/item-hash/out/. These will need to be packaged for distros later, it's unclear how we could use cargo install with these as cargo doesn't support arbitrary artefacts like this (yet?).
Fixes#250, replacing cookies with auth-bearer tokens. This is done using fernet with randomised keys each startup. The reason for this is that in the future the size of the auth token may exceed cookie limits, so we must be able to understand and process auth bearer. Additionaly, this lets us store the tokens for say the kanidm cli as reqwest today can't persist a cookie jar.
Fixes#101, concurrent caching of IDL and Entries. This yields a 10% improvement for test case execution, and 35% for tests run under --release mode. A lot of code around the code base was needed to be touched due to the extra need for mut in some operations and some lifetimes, but the majority of the work was in idl_arc_sqlite.rs, which has the cache layer. There are many performance gains yet to see, but most of those will come through improvement of the concread ARC and it's related BTree implementation.
Implements #132, the recycle bin. This completes the feature, with working API's, front end tests and CLI tooling. It also includes a refactor of the CLI tools to make them a bit easier to manage/work with.
