feat: Add mycelium package to workspace

- Add the `mycelium` package to the workspace members.
- Add `sal-mycelium` dependency to `Cargo.toml`.
- Update MONOREPO_CONVERSION_PLAN.md to reflect the addition
  and completion of the mycelium package.

Cargo.toml

@@ -11,7 +11,7 @@ categories = ["os", "filesystem", "api-bindings"]
 readme = "README.md"
 
 [workspace]
-members = [".", "vault", "git", "redisclient"]
+members = [".", "vault", "git", "redisclient", "mycelium"]
 
 [dependencies]
 hex = "0.4"
@@ -62,6 +62,7 @@ async-trait = "0.1.81"
 futures = "0.3.30"
 sal-git = { path = "git" }
 sal-redisclient = { path = "redisclient" }
+sal-mycelium = { path = "mycelium" }
 
 # Optional features for specific OS functionality
 [target.'cfg(unix)'.dependencies]