Added libduckdb.dylib and updated changelog

[jaapbrasser]

Added libduckdb.dylib for MacOS support

The downside of the fix is that adding the library for each individual OS will result in longer download times.

An alternative solutions could be:

• To determine the OS on module load, or module first load, and verify that the download the libraries then
• Add error handling, when dll is not found with error message: Unable to load shared library 'duckdb' or one of its dependencies., download the file(s) and rerun the previous command.

Additionally, because this is an unsigned file, I first had to manually click to open this file before it was allowed to load because of the [Apple can't check app for malicious software](https://support.apple.com/en-gb/guide/mac-help/mchleab3a043/mac) message. I have not investigated if there's a programmatic solution for this as of yet.

[jaapbrasser]

Issue in #3

[merill]

Thanks @jaapbrasser tested and works on macOS now. I didn't get the macOS prompt to manually click, maybe because I installed duckdb previously. Will need to test this on a fresh macVM to confirm.

I believe for Linux support the .so file needs to be included.

[Agazoth]

@merill you are right. Adding the .so file to the lib folder makes the module run on Linux.