Document connections.list result shape in skills.ts

[baggiiiie]

issue

when agents call tools.executor.coreTools.connections.list({}) the actual output is

{
  ok: true,
  data: {
    connections: [connection objects],
  }
}

while execute skill doesn't explicitly say where the connection array is inside the {ok , data} envelope.

i have observed that agents almost always tend to write code like:

const result = await tools.executor.coreTools.connections.list({});
for (const conn of result) {
  const slug = conn.integration;
  // something else, e.g., search a tool with name 
}

which gives an error, as conn.integration is invalid.

fix

i've added instructions in skills to document how to deal with results from tools.executor.coreTools.connections.list({}). been running this local build for a week now, have seen significant improvements on this, no mistake at all across 50+ calls! hence im opening this PR