feat: add BracketAwareCsvParser to parse CSV file better

[HashCookie]

Part of: apache/casbin-editor#164

Original Issue
Limitations of CSV parser:

• The csv-parse library is mainly used for processing standard CSV format.
• Unable to handle complex policy expressions correctly
• Improper handling of commas and parentheses within quotation marks.
• Does not support nested expressions

Improvement plan
Custom parser:

const tokens: string[] = [];
let currentToken = '';
let inQuotes = false;
let bracketCount = 0;

• Can handle commas inside quotation marks
• Support nested parentheses
• Correctly handle escape characters

[HashCookie]

Continue using csv-parse,improves the HelperloadPolicyLine method by modifying the parsing logic to address two significant scenarios that the previous implementation couldn’t handle effectively:

1. Support for Nested Brackets in Policy Lines

• In policy lines containing nested structures (e.g., keyMatch("IT", r.sub.org) or regexMatch("(abc|def)", attr)), the previous implementation would incorrectly split tokens due to its reliance on CSV parsing alone.
• The updated logic now ensures that nested brackets are tracked and only complete expressions are added as tokens.

2. Proper Handling of Quote Escaping

• Policy lines with escaped quotes (e.g., keyMatch(""IT"", r.sub.org)) are now correctly processed. Escaped quotes ("") are replaced with a single quote ("), ensuring accurate policy values.

[github-actions]

🎉 This PR is included in version 5.36.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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