Awesome: sub-step counter shows the number of direct sub-steps only

**Describe the bug**
If a test has multiple nested steps, the number of sub-steps is displayed next to the parent step's name. Unlike in Allure 2, Allure Awesome only displays the number of direct sub-steps in this case, rather than the total number of all sub-steps (including the children of direct sub-steps, their children, and so on).

This is especially noticeable when a step has failed sub-steps nested several levels deep. #210 has implemented an indicator that displays the total number of such sub-steps next to the parent step's name. Unlike the counter for the total number of sub-steps, it counts failed sub-steps recursively, which creates a misalignment between the two numbers.

**To Reproduce**
Steps to reproduce the behavior:
1. Create the following test result:
```json
{
"name": "Foo",
"fullName": "foo",
"historyId": "foo",
"testCaseId": "foo",
"status": "failed",
"stage": "finished",
"steps": [
{
"type": "step",
"name": "Step 1",
"status": "passed",
"stage": "finished",
"steps": [
{
"type": "step",
"name": "Step 1.1",
"status": "passed",
"stage": "finished",
"steps": [
{
"type": "step",
"name": "Step 1.1.1",
"status": "passed",
"stage": "finished"
}
]
}
]
}
]
}
```
2. Generate and open the report.
3. Navigate to the test and check the counter next to the parent step's name.

**Expected behavior**
The counter should display `2` instead of `1`.

**Screenshots**

Reproduce the issue by generating the report from the nested JSON test result and inspect where the Awesome UI renders the sub-step counter next to the parent step. Confirm that the counter includes nested descendants recursively and displays 2 for the provided example.

Written by the indexing model from the issue text.