v.embed_file: add .to_string() and .to_bytes() utility methods

Author: spytheman

doc/docs.md

@@ -3558,12 +3558,10 @@ Full list of builtin options:
 #### $embed_file
 
 ```v ignore
-module main
+import os
 fn main() {
 	embedded_file := $embed_file('v.png')
-	mut fw := os.create('exported.png') or { panic(err.msg) }
-	fw.write_bytes(embedded_file.data(), embedded_file.len)
-	fw.close()
+	os.write_file('exported.png', embedded_file.to_string()) ?
 }
 ```
 

vlib/v/embed_file/embed_file.v

@@ -36,6 +36,22 @@ pub fn (mut ed EmbedFileData) free() {
 	}
 }
 
+pub fn (original &EmbedFileData) to_string() string {
+	unsafe {
+		mut ed := &EmbedFileData(original)
+		the_copy := memdup(ed.data(), ed.len)
+		return byteptr(the_copy).vstring_with_len(ed.len)
+	}
+}
+
+pub fn (original &EmbedFileData) to_bytes() []byte {
+	unsafe {
+		mut ed := &EmbedFileData(original)
+		the_copy := memdup(ed.data(), ed.len)
+		return the_copy.vbytes(ed.len)
+	}
+}
+
 pub fn (mut ed EmbedFileData) data() byteptr {
 	if !isnil(ed.uncompressed) {
 		return ed.uncompressed