feat: improved WASI sandboxing

Implements a restricted subset of the WASI ABI (wasi_snapshot_preview1) to support proxy-wasm modules that require base level WASI functionality. This implementation adds a ABI_WASI class to handle WASI-specific functions:
 
- Supports core WASI functions required by proxy-wasm spec 
- Implements fd_write for stdout/stderr logging 
- Adds support for clock, random, environment, and args functions 

This should result in a better sandboxing of the guest modules.

Author: chirino

proxy-wasm-java-host/src/main/java/io/roastedroot/proxywasm/PluginFactory.java

@@ -5,7 +5,6 @@
 import com.dylibso.chicory.runtime.ImportMemory;
 import com.dylibso.chicory.runtime.Instance;
 import com.dylibso.chicory.runtime.Machine;
-import com.dylibso.chicory.wasi.WasiOptions;
 import com.dylibso.chicory.wasm.WasmModule;
 import io.roastedroot.proxywasm.internal.ProxyWasm;
 import java.net.URI;
@@ -319,20 +318,6 @@ public PluginFactory.Builder withMachineFactory(
             return this;
         }
 
-        /**
-         * Configures WebAssembly System Interface (WASI) options for the plugin instance.
-         * WASI provides a standard interface for WASM modules to interact with the underlying operating system
-         * for tasks like file system access, environment variables, etc. While Proxy-WASM defines its own ABI,
-         * some modules might also utilize WASI features.
-         *
-         * @param options The {@link WasiOptions} to configure for the WASI environment.
-         * @return this {@code Builder} instance for method chaining.
-         */
-        public PluginFactory.Builder withWasiOptions(WasiOptions options) {
-            proxyWasmBuilder.withWasiOptions(options);
-            return this;
-        }
-
         /**
          * Configures whether the plugin instance should be shared across multiple host requests or contexts.
          *

proxy-wasm-java-host/src/main/java/io/roastedroot/proxywasm/internal/ABI.java

@@ -8,6 +8,7 @@
 import com.dylibso.chicory.annotations.HostModule;
 import com.dylibso.chicory.annotations.WasmExport;
 import com.dylibso.chicory.runtime.ExportFunction;
+import com.dylibso.chicory.runtime.HostFunction;
 import com.dylibso.chicory.runtime.Instance;
 import com.dylibso.chicory.runtime.Memory;
 import com.dylibso.chicory.runtime.WasmRuntimeException;
@@ -1921,4 +1922,17 @@ void proxyOnForeignFunction(int contextId, int functionId, int argumentsSize) {
         }
         proxyOnForeignFunctionFn.apply(contextId, functionId, argumentsSize);
     }
+
+    @WasmExport
+    void emscriptenNotifyMemoryGrowth(int size) {}
+
+    public HostFunction[] toHostFunctions() {
+        var functions = new ArrayList<>(List.of(ABI_ModuleFactory.toHostFunctions(this)));
+
+        HostFunction[] wasiFunctions = new ABI_WASI(handler).toHostFunctions();
+        functions.addAll(List.of(wasiFunctions));
+        functions.addAll(List.of(Helpers.withModuleName(wasiFunctions, "wasi_unstable")));
+
+        return functions.toArray(new HostFunction[0]);
+    }
 }