feat: init commit

test_data/endless_wasm/README.md

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+This directory contains the source code of two WebAssembly modules, bot of them
+perform an endless loop.
+
+The code is written using the WebAssembly text format (aka `WAT`).
+
+## `wasm_endless_loop.wat`
+
+This is a module meant to be used with vanilla wasmtime engine.
+
+The code exports a function called `endless_loop` that just performs
+and endless loop.
+This function takes zero parameters and doesn't return anything.
+
+The `start` function of the WebAssembly module invokes the `endless_loop`, that
+means that running the final `.wasm` file via something like `wasmtime run` will
+cause the endless function to be executed.
+
+## `wapc_endless_loop.wat`
+
+This is a module meant to be used by a waPC host.
+
+This code cheats a little, from the outside it looks like any regular waPC module
+because it exposes the two functions required by a waPC host. However, these
+two functions are reduced to the bare mimimum.
+
+The most important difference is that no waPC function is registered by the
+module. Calling any kind of waPC function from the host will result in an
+endless loop being executed.