Feature Request: Trim leading SSM Parameter slash

**Summary**

```
Task: SystemsManagerGetParameter@1
Tool Version: 1.5.0
```

When I am using the SystemsManagerGetParameter task and select `hierarchy` for the readMode and then select `substitute` for the transform, it will take something like /system/subsystem/web/ip and set it to the Azure Variable: `/SYSTEM/SUBSYSTEM/WEB/URL`.

If I was to specify something like `/` as the pattern and `_` as the replace text, it turns into `_SYSTEM_SUBSYSTEM_WEB_ULR`.

This does not conform to all of the other variables that are included or created by other tasks. They all start with a letter.

**Desired Solution**
Allow one of the following, always remove the preceding slash or allow for optional removal of the

**Alternatives**
The only alternative I could find was to pull each parameter one at a time and use the custom name feature.

The issue identifies SystemsManagerGetParameter@1 and the hierarchy/substitute path; start by locating that task’s readMode and transform handling and reproduce the /system/subsystem/web/ip example. Done means the transformed Azure variable no longer has a leading slash, or slash removal is optional as specified, with behavior verified for the stated pattern and replacement.

Written by the indexing model from the issue text.