Use gameval in more places

[Lexer747]

Summary

Replaces many hard coded IDs with the runlite.api.gameval package. This is unfortunately not exhaustive, it doesn't cover:

• region IDs
• graphic object ids, (yama fireballs)

---

Removes projectiles from the powered staves section, this code was never used as it would've required usage of a deprecated Runelite API (#56 (comment)) which we want to stay away from. So its time to just remove it.

---

Adds copyright and license headers to some files which were missing them.

Testing

Did a Yama kill and didn't notice any problems.

[Lexer747]

My greater question and why this is draft is about stripping out some of the enums we define in the plugin. It comes down to a few things:

1. Naming discrepancies
2. Set/Hashmap O(1) lookups
3. Relational data we store along side that gameval does not have

[Lexer747]

So my conclusion is just to keep the sets and lookups the names are now just legacy but this keeps algorithmic and relation data we want without having hard coded IDs.

Of note there seems to have been some genuine drift in IDs, placeholder versus cert whatever that means. E.g. for hallowfell

it has a concrete ID 34027 but then a place holder id at 34029 and a cert id at 34028. I'm electing to just trust runelite/wiki and only use the proper id.