Support for batches of calls using kickoff_for_each

Here is the output with one call
```
Input Tokens: 7601
INFO:root:Input Tokens: 7601
Output Tokens: 1160
INFO:root:Output Tokens: 1160
Total Tokens: 8761
INFO:root:Total Tokens: 8761
Cost: $0.030603
INFO:root:Cost: $0.030603
Monitoring ended.
INFO:root:Monitoring ended.
Total Time: 8.54 seconds
INFO:root:Total Time: 8.54 seconds
Input Tokens: 7601
INFO:root:Input Tokens: 7601
Output Tokens: 1160
INFO:root:Output Tokens: 1160
Total Tokens: 8761
INFO:root:Total Tokens: 8761
Cost: $0.030603
INFO:root:Cost: $0.030603
CPU Usage: [16.8, 0.7, 2.1, 0.9, 1.6]
INFO:root:CPU Usage: [16.8, 0.7, 2.1, 0.9, 1.6]
Memory Usage: [299.953125, 254.8125, 255.6875, 257.84375, 258.375] MB
INFO:root:Memory Usage: [299.953125, 254.8125, 255.6875, 257.84375, 258.375] MB
Carbon Emissions: 0.876100 kg CO2
INFO:root:Carbon Emissions: 0.876100 kg CO2

--- Agent Watch Summary ---
Total Time: 8.54 seconds
Input Tokens: 7601
Output Tokens: 1160
Total Tokens: 8761
Cost: $0.030603
Average CPU Usage: 4.42%
Average Memory Usage: 265.33 MB
Carbon Emissions: 0.876100 kg CO2
----------------------------
```

and here is the output with a batch of 2 calls
```
No token usage information available in CrewOutput.
INFO:root:No token usage information available in CrewOutput.
Monitoring ended.
INFO:root:Monitoring ended.
Total Time: 14.30 seconds
INFO:root:Total Time: 14.30 seconds
Input Tokens: 0
INFO:root:Input Tokens: 0
Output Tokens: 0
INFO:root:Output Tokens: 0
Total Tokens: 0
INFO:root:Total Tokens: 0
Cost: $0.000000
INFO:root:Cost: $0.000000
CPU Usage: [18.2, 0.8, 2.2, 0.8, 0.8, 0.8, 0.9, 2.5]
INFO:root:CPU Usage: [18.2, 0.8, 2.2, 0.8, 0.8, 0.8, 0.9, 2.5]
Memory Usage: [302.640625, 296.265625, 298.515625, 299.84375, 299.84375, 252.828125, 253.125, 253.828125] MB
INFO:root:Memory Usage: [302.640625, 296.265625, 298.515625, 299.84375, 299.84375, 252.828125, 253.125, 253.828125] MB
Carbon Emissions: 0.000000 kg CO2
INFO:root:Carbon Emissions: 0.000000 kg CO2

--- Agent Watch Summary ---
Total Time: 14.30 seconds
Input Tokens: 0
Output Tokens: 0
Total Tokens: 0
Cost: $0.000000
Average CPU Usage: 3.38%
Average Memory Usage: 282.11 MB
Carbon Emissions: 0.000000 kg CO2
----------------------------
```

agent-watch should check if results is a list and in this case aggregate the metrics it collects over all the results items.