feat: fix 'in' operator parsing for tuple literals in matcher expressions

[Copilot]

jCasbin failed to parse in operator expressions with tuple literals like r.obj in ('data2', 'data3'), throwing syntax errors. The regex pattern couldn't handle commas, single quotes, or spaces within parentheses.

Changes

• Updated regex pattern from ([a-zA-Z0-9_.()\"]*) +in +([a-zA-Z0-9_.()\"]*) to ([^\s]+?) +in +(\([^)]*\)|\S+) to match parenthesized expressions and handle tuple syntax

• Added smart tuple conversion in replaceInSyntaxWithInclude(): converts comma-separated parenthesized expressions to AviatorScript's tuple() function, while preserving single values and variables

• Added comprehensive test coverage for tuple literals with various quote styles, multiple in operators, and edge cases

Example

// Before: Syntax error
"r.obj in ('data2', 'data3')"

// After: Converts to valid AviatorScript
"include(tuple('data2', 'data3'), r.obj)"

The conversion logic checks for commas to distinguish tuple literals from parenthesized values:

• ('data2', 'data3') → tuple('data2', 'data3') ✓
• ("bob") → ("bob") (preserved)
• someArray → someArray (preserved)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>'in' of matcher</issue_title>
<issue_description>model.conf:

[request_definition]
r = sub, obj, act

[policy_definition]
p = sub, obj, act

[role_definition]
g = _, _

[policy_effect]
e = some(where (p.eft == allow))

[matchers]
m = g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act || r.obj in ('data2', 'data3')

OK in Node-Casbin:

But in jcasbin:

Syntax error: invalid token at 64, lineNumber: 1, token : [type='Char',lexeme=',',index=64],
while parsing expression: `
g(r_sub, p_sub) && r_obj == p_obj && r_act == p_act || include((,^^^
`
, error: exit status 1

</issue_description>

Comments on the Issue (you are @copilot in this section)

@hsluoyz @lonelyxmas can you share the Casbin editor link? (click "SHARE" button)

• Fixes [bug] 'in' of matcher doesn't work: "m = g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act || r.obj in ('data2', 'data3')" #498

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 67.92%. Comparing base (b334732) to head (5cda428).

Files with missing lines	Patch %	Lines
src/main/java/org/casbin/jcasbin/util/Util.java	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #499   +/-   ##
=======================================
  Coverage   67.91%   67.92%           
=======================================
  Files          63       63           
  Lines        3079     3083    +4     
  Branches      573      574    +1     
=======================================
+ Hits         2091     2094    +3     
  Misses        805      805           
- Partials      183      184    +1     

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