wasm2c: add page (#2375)

pages/common/wasm2c.md

@@ -0,0 +1,11 @@
+# wasm2c
+
+> Convert a file from the WebAssembly binary format to a C source file and header.
+
+- Convert a file to a C source file and header and display it to the console:
+
+`wasm2c {{file.wasm}}`
+
+- Write the output to a given file (file.h gets additionally generated):
+
+`wasm2c {{file.wasm}} -o {{file.c}}`