Changing 'Output Schema' to 'Input Schema'

[automaton82]

As discussed @HenryHengZJ, I updated "Output Schema" to "Input Schema" for tools. This included the label, tooltip and, code example comments.

I also made a minor change to the data source initialization console log to help differentiate it from when it's finished. I start a lot of Flowise instances and since both log statements end with "initialized!" it gets confusing which got stuck initializing and which did not.

If you disagree with this part of the change let me know and I'll take it out and only submit the schema language change. Thanks!

[automaton82]

The checks failed with This project is configured to use v8.14.0 of pnpm. Your current pnpm is v9.0.1 but that one isn't on my changes 😄