RTG Buffs via ItemDurationMultiplier

[SomeonesShade]

RTG Phase is now buffable under the code changes.

[TODO: Do the changes, add picture]

(Blast Steam... yeah I tried but there is no way to make it work lol in concept. Massive water consumption is tackled with spore, pyra has high power/refined/coal effecient, and coal. is the raw ore into power conversion. Blast has no place.)

If your pull request is not translation or serverlist-related, read the list of requirements below and check each box:

• [x] I have read the contribution guidelines.
• [x] I have ensured that my code compiles, if applicable.
• [x] I have ensured that any new features in this PR function correctly in-game, if applicable.

TODO:

• [ ] UI?

[camelStyleUser]

killer check for null

[SomeonesShade]

nice, should be fixed btw should i wait for https://github.com/Anuken/Mindustry/pull/9633 in doing the ui? I can probably make my own (at least good enough for now)