- Refactors `trix.Encode` and `trix.Decode` to allow for dependency injection, enabling the testing of I/O error paths.
- Adds comprehensive tests for the `trix` package to cover all error paths.
- Adds tests for the `Fletcher` checksums and `ensureRSA` function in the `crypt` package.
- Adds tests for the `lthn` package to cover the `SetKeyMap` and `GetKeyMap` functions.
- Adds tests for the `chachapoly` package to cover error paths.
- Adds tests for the `rsa` package to cover error paths.
This commit restructures the `crypt` service to be more modular and decoupled from storage concerns.
- The standard cryptographic implementations (`lthn`, `chachapoly`, `rsa`) have been moved to the `pkg/crypt/std` directory.
- The `rootfs` components have been removed to decouple the library from storage.
- Import paths have been updated to reflect the new structure.
