Tools calling support for SystemLanguageModel

[airy10]

Tools calling is missing from SystemLanguageModel because we need to bridge the two Tool classes

I've done some basic implementation (only tested with string output and parameters type) at https://github.com/airy10/AnyLanguageModel/tree/apple-tools-support - but still only quickly tested with my Tools

I can do some pull request but I'm not sure it's ready for that (while still useful to me :) )

[airy10]

After more tests on that branch, there is still some work to do on the schema conversion between the two models - some is missing, some is wrong - but the basic architecture is there. Working on fixing it

[airy10]

I've pushed my latest changes. It should be quite complete now for most schemas

[mattt]

Thanks again for your help with this, @airy10. I merged #49, and just cut 0.5.0.