Created SC2247 (markdown)

SC2247.md

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+## Flip leading $ and " if this should be a quoted substitution.
+
+### Problematic code:
+
+```sh
+var=$"(whoami)"
+```
+
+### Correct code:
+
+```sh
+var="$(whoami)"
+```
+
+### Rationale:
+
+ShellCheck has found a `$"(` or `$"{` . This is most likely due to flipping the dollar-sign and double quote:
+
+    echo $"(cmd)"  # Supposed to be "$(cmd)"
+    echo $"{var}"  # Supposed to be "${var}"
+
+Instead of quoted substitutions, these will be interpreted as localized string resources (`$".."`) containing literal parentheses or curly braces. If this was not intentional, you should flip the `"` and `$` like in the example.
+
+### Exceptions:
+
+If you intentionally wanted a localized string literal `$".."` that starts with `(` or `{`, either [[ignore]] this error or start it with a different character.
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!