### Get POSIX Time Zone String

Source: https://github.com/anonymousaga/tzdblookup/blob/main/README.md

Retrieve the POSIX string representation for a given IANA time zone name. This is useful for configuring time zones on embedded systems.

```cpp
#include <TzDbLookup.h>
const char* tz = TzDbLookup::getPosix("America/Los_Angeles");

```

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