[js] decorator support for openinference-core

[mikeldking]

support decorators for:

• chain
• tool
• ....

in typescript / javascript

[cephalization]

Do we actually want function decorators or do we want functional type helpers that help users create span attributes of the correct shape?

[cephalization]

I will likely do both, using stage 3 decorators in typescript

[mikeldking]

Will open a branch