Refactor Library

The launcher code was in a position ripe for sphagetti, so this rewrites it in a more robust way.
In addition to cleaner code, this provides the following changes:
- Removal of obsolete Mojang authentication
- The rebasing of some internal state into a Sled database
- Tweaks which make some internal mechanisms more robust (e.g. profiles which fail to load can be removed)
- Additional tooling integration such as direnv
- Distinct public API to avoid messing with too much internal code
- Unified error handling in the form of `theseus::Error` and `theseus::Result`

theseus/Cargo.toml

@@ -10,7 +10,10 @@ edition = "2018"
 thiserror = "1.0"
 async-trait = "0.1.51"
 
-daedalus = "0.1.12"
+daedalus = { version = "0.1.16", features = ["bincode"] }
+
+bincode = { version = "2.0.0-rc.1", features = ["serde"] }
+sled = { version = "0.34.7", features = ["compression"] }
 
 reqwest = { version = "0.11", features = ["json"] }
 serde = { version = "1.0", features = ["derive"] }
@@ -36,13 +39,9 @@ sys-info = "0.9.0"
 log = "0.4.14"
 const_format = "0.2.22"
 once_cell = "1.9.0"
-lazy_static = "1.4"
 
 [dev-dependencies]
 argh = "0.1.6"
 pretty_assertions = "1.1.0"
 
-[[example]]
-name = "download-pack"
-
 [features]