Expand snippets on signs and graffiti

[anothersimulacrum]

Summary

None

Purpose of change

Let people placing graffiti and signs use snippets.

Describe the solution

Expand snippets when applying tags.

Testing

Add a snippet (must be a snippet category that begins with < and ends with > (all expandable snippets)) to graffiti, see the graffiti spawn in the world with the snippet expanded.

[LyranRenegade]

Don't forget to also include the notes!
So we can make stuff like this work:

    {   
        "//": "3 variants of the same puzzle, 1 cryptic, 1 cryptic, other side, 1 for dummies, or just one for dummies",
        "type": "snippet",
        "category": "ha_snippet_mystery_note_squat",
        "text": [
            { 
                "id": "ha_squat_mystery_note_1", 
                "text": "A piece of paper with big letters written on it that say: \"<ha_given_name> I knew you would find this. Find me at <ha_squat_name>. There's a surprise underneath the section of RED carpet at the ground-floor in the hallway next to the toilet.\nLOVE, Cyrus\np.s. Sorry, I smoked your stash :)\""
            }
        ]
    },
    ```