Allow clearing Dark Tanks in the crafting grid

[Copilot]

Dark Tanks could retain unwanted fluid with no direct way to discard it. This adds a one-item crafting recipe that returns the same tank with its fluid content removed.

• Recipe support

  • Adds a special fluid-container clearing recipe and serializer.
  • Preserves tank metadata such as capacity while removing fluid content.
  • Registers the recipe for evilcraft:dark_tank.

• Coverage

  • Adds a game test verifying that a filled Dark Tank crafts into an empty tank.

{
  "type": "evilcraft:crafting_special_fluidcontainer_clear",
  "item": {
    "item": "evilcraft:dark_tank"
  }
}

• Fixes [Suggestion] Allow the ability to void a tank by placing on the crafting grid alone #1241

[coveralls]

Coverage Report for CI Build 30838396084

Coverage increased (+0.1%) to 29.393%

Details

• Coverage increased (+0.1%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 15 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

15 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
org/cyclops/evilcraft/EvilCraft.java	13	0.0%
org/cyclops/evilcraft/block/BlockSpiritPortal.java	2	67.57%

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Coverage Stats

Relevant Lines:	15171
Covered Lines:	5187
Line Coverage:	34.19%
Relevant Branches:	5640
Covered Branches:	930
Branch Coverage:	16.49%
Branches in Coverage %:	Yes
Coverage Strength:	1.6 hits per line

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💛 - Coveralls