chore: doc interpreter (#607)

# Description

This PR contains a spec/document for the WIT<->IPLD interpreter, which
converts WIT runtime values to IPLD data model values based on WIT
types. Consider this a living document on the state of the interpreter.

Includes: 

- added testing 
- function name handling of varying cases

---------

Signed-off-by: Zeeshan Lakhani <[email protected]>
Co-authored-by: Brian Ginsburg <[email protected]>

README.md

@@ -129,9 +129,12 @@ represents the `Homestar` runtime. We recommend diving into each package's own
 - [homestar-wasm](./homestar-wasm)
 
   This *wasm* library manages the [wasmtime][wasmtime] runtime, provides the
-  [Ipld][ipld] to/from [Wit][wit] interpreter/translation-layer, and implements
+  [IPLD][ipld] to/from [WIT][wit] interpreter/translation-layer, and implements
   the input interface for working with Ipvm's standard Wasm tasks.
 
+  You can find the spec for translating between IPLD and WIT runtime values
+  based on WIT types [here](./homestar-wasm/README.md##interpreting-between-ipld-and-wit).
+
 - [homestar-workflow](./homestar-workflow)
 
   The *workflow* library implements workflow-centric [Ipvm features][ipvm-spec]

homestar-wasm/Cargo.toml

@@ -54,6 +54,7 @@ wit-component = "0.200"
 
 [dev-dependencies]
 criterion = "0.5"
+serde_json = { workspace = true }
 tokio = { workspace = true }
 
 [features]