release: include error metadata file for launcher purposes (#1463)

* release: include error metadata file for launcher purposes

* release: put release assets in the top level of the 7z/tarball (no out/ dir)

* extractor: ensure critical directories are created

* extractor: handle weird Win32 path prefix `\\?\` by stripping it out

* release: avoid using `-C` with `tar`

.github/scripts/releases/error-code-metadata.json

@@ -0,0 +1,20 @@
+{
+  "4000": {
+    "msg": "Validation Failed: Cannot locate ELF"
+  },
+  "4001": {
+    "msg": "Validation Failed: Game serial missing from valid game database"
+  },
+  "4002": {
+    "msg": "Validation Failed: ELF missing from valid game database"
+  },
+  "4010": {
+    "msg": "Validation Failed: Bad or unexpected ISO contents"
+  },
+  "4011": {
+    "msg": "Validation Failed: Extracted an unexpected amount of files from ISO"
+  },
+  "4020": {
+    "msg": "Validation Failed: ISO Extraction failed, output directory did not contain expected files"
+  }
+}