Release Notes:
- Added Runnable for C main function
This tags can then be used in tasks, for example:
```json
[
{
"label": "Run ${ZED_STEM}",
"command": "gcc",
"args": [
"$ZED_FILE",
"-o",
"${ZED_DIRNAME}/${ZED_STEM}.out",
"&&",
"${ZED_DIRNAME}/${ZED_STEM}.out"
],
"tags": ["c-main"]
}
]
```