Fix Item granted skills not showing up as Implicits when pasting

[unrealdreamz]

Summary

• Keep pasted base-granted skill lines implicit when they appear after an implicit separator.
• Add a regression using the reported spear paste text.

Root Cause

• Imported items already know that some base implicits grant skills.
• Pasted item parsing could leave the implicit section after a separator and then treat Grants Skill: ... as a normal explicit/unknown line.
• For spear bases, that meant Grants Skill: Spear Throw could be misclassified instead of detected as the base-granted skill.

Fix

• Add a small base-implicit line helper for raw item parsing.
• When parsing pasted game text, preserve a line as implicit if it exactly matches an implicit line on the resolved item base.
• Do not force such base-implicit lines into explicit mod handling.
• Preserve the following explicit mods normally.

Validation

• PASS: git diff --check
  • Output only included line-ending warnings from the Windows checkout.
• PASS: Lua syntax check for the touched files using lupa.
• PASS: targeted Busted spec after installing the repo's LuaJIT/Busted dependencies locally:
  • Command: busted --lua=luajit ../spec/System/TestItemParse_spec.lua
  • Output: 25 successes / 0 failures / 0 errors / 0 pending : 0.329 seconds
• Not run locally: docker-compose up
  • Docker/docker-compose are not available in this local environment.
• ModCache regeneration: not applicable; this PR does not change mod parsing.

Risk / Rollback

• Low risk: the special handling only applies when a pasted line exactly matches the resolved base implicit.
• Explicit mods following the granted skill remain explicit and are covered by the regression.
• Rollback is the parser helper/branch plus the test.

Fixes #1728

[cbui]

I think this commit breaks the implicit parsing and the slider for the item. It keeps appending the implicit over and over.

@LocalIdentity @unrealdreamz

[LocalIdentity]

@cbui I need steps for how you encountered that bug
Just figured it out

[LocalIdentity]

@cbui now fixed on dev. Thanks for letting me know