(Experimental) Holograms: Add support for CMI as a fallback handler

[TheFlagCourier]

Brief Description:

Piggy-backing off of #386, this PR adds CMI as a fallback hologram handler.

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Changes:

• Adds experimental support for CMI's holograms to the HologramUtil

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Relevant FlagWar Issue tickets:

N/A

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• I have tested this pull request for defects on a server.

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By making this pull request, I represent that I have read and agree to release my own changes that I
have submitted under the terms of the accompanying license (Apache-2.0). I guarantee that these
changes are mine and are not encumbered by any other license or restriction to the best of my
knowledge.

[TheFlagCourier]

Will circle back around to this later, as it's obviously failing the JDK 17 test due to CMILib & CMI-API.
Some Options:

• A.) Roll back the libraries until a compatible version is found.
• B.) Bump FlagWar to JDK 21, and pin development to MC 1.21+ — dropping broad compatibility with MC 1.19.X
• C.) Shelve this until Towny rolls past Option B, itself, then follow through.
• D.) Abandon

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Update 2026-01-26: Confirmed issue is within CMI-API, as it build targets Java 21 natively (despite CMILib targeting Java 8). Holding out for Option C.