Ignore Postman requests

# Ignore Postman requests

## Context

Postman & Newman do not have any support for ignoring one request or all requests of a folder or sub-folder.
If we're working on a NRT, it's more easy to ignore it rather than commenting it to prevent it from breaking the thresholds.

## Expected

We however can let Postman & Newman execute all requests, BUT if some requests/folders have the tag `@ignore` in their name, the request will not be indexed by ARA (and the request(s) will be marked as IGNORED in the bottom of the home page when indexing a VCS branch).

**Important** : support any order for `@ignore` and `@severity-*`: a request or folder with name `@ignore @severity-high Some Title` must be ignored, as well as a `@severity-high @ignore Some Title` one, but NOT this one: `@severity-high Some Title With @ignore`.

**Important** : an ignored folder should make all its sub-folders and sub-requests ignored as well.

No files or tests are named. Start by locating the Postman/Newman request-indexing entry point and its name or tag parsing; verify @ignore ordering, exact-name matching, and recursive folder propagation, then confirm ignored requests are shown as IGNORED.

Written by the indexing model from the issue text.