Add wasm2wat function and CLI

Sources/CLI/CLI.swift

@@ -11,6 +11,7 @@ struct CLI: AsyncParsableCommand {
             Explore.self,
             Run.self,
             Wat2wasm.self,
+            Wasm2wat.self,
         ]
     )
 }

Sources/CLICommands/CMakeLists.txt

@@ -2,6 +2,7 @@ add_wasmkit_library(CLICommands
     Explore.swift
     Run.swift
     Wat2wasm.swift
+    Wasm2wat.swift
 )
 
 target_link_wasmkit_libraries(CLICommands PUBLIC

Sources/CLICommands/Wasm2wat.swift

@@ -0,0 +1,49 @@
+import ArgumentParser
+import SystemPackage
+import WAT
+import WasmParser
+
+package struct Wasm2wat: ParsableCommand {
+    package static let configuration = CommandConfiguration(
+        commandName: "wasm2wat",
+        abstract: "Disassemble a WebAssembly binary into WebAssembly text format"
+    )
+
+    @Argument(help: "Path to a WebAssembly binary (`.wasm`) file to disassemble.")
+    var path: String
+
+    @Option(
+        name: [.short, .long],
+        help: """
+            Path to the output WebAssembly Text Format (`.wat`) file.
+            If not provided, the text is written to standard output.
+            """
+    )
+    var output: String?
+
+    package init() {}
+
+    package func run() throws {
+        let filePath = FilePath(path)
+        let fileHandle = try FileDescriptor.open(filePath, .readOnly)
+        defer { try? fileHandle.close() }
+
+        let stream = try FileHandleStream(fileHandle: fileHandle)
+
+        let wat = try wasm2wat(stream)
+
+        if let outputPath = output {
+            let outPath = FilePath(outputPath)
+            let outHandle = try FileDescriptor.open(
+                outPath,
+                .writeOnly,
+                options: [.create, .truncate],
+                permissions: [.ownerReadWrite, .groupRead, .otherRead]
+            )
+            defer { try? outHandle.close() }
+            try outHandle.writeAll(Array(wat.utf8))
+        } else {
+            print(wat)
+        }
+    }
+}

Sources/WAT/CMakeLists.txt

@@ -2,13 +2,16 @@ add_wasmkit_library(WAT
   BinaryEncoding/BinaryInstructionEncoder.swift
   BinaryEncoding/Encoder.swift
   Lexer.swift
-  Location.swift
   NameMapping.swift
   ParseTextInstruction.swift
   Parser.swift
   Parser/ExpressionParser.swift
   Parser/WastParser.swift
   Parser/WatParser.swift
+  Printer/InstructionMnemonics.swift
+  Printer/ModuleCollector.swift
+  Printer/TextInstructionVisitor.swift
+  Printer/WatPrinter.swift
   WAT.swift
   WatParserError.swift
 )

Sources/WAT/Lexer.swift

@@ -1,4 +1,5 @@
 import WasmParser
+import WasmTypes
 
 enum TokenKind: Equatable {
     case leftParen