[ZhuchkaTriplesix]

Closes #1567.

• _parseJsoncObject uses stripJsonc (string-aware, trailing commas) instead of two regexes, so "https://example.com" survives.
• sql.format lays out blanks and ; only in code segments (SqlLexicalScanner) and uppercases through formatSqlScript (fix(editor): Format SQL uppercases words inside string literals, quoted identifiers and comments #1566): literals, quoted identifiers and comments are kept as written. No per-call regex compilation.
• sql.parse skips leading comments (stripLeadingWhitespaceAndLineComments) and takes the first word with one firstMatch.
• Tests: format with keywords and ; inside literals/comments, uppercaseKeywords:false, parse after comments, JSONC with URL, /* in a string and a trailing comma.

[ZhuchkaTriplesix]

🔍 Post-Merge Code Review & Verification

Crucial parser and formatter precision improvements:

1. Lexical SQL Formatting (declarative_embedded_engine.dart):

   • Replacing global regex replacements with SqlLexicalScanner.segments(source) ensures semicolons, whitespace, and keyword casing transformations are strictly applied to SqlSegmentKind.code.
   • String literals, comments, and quoted identifiers are preserved verbatim with no corruption of embedded punctuation or keywords.

2. String-Aware JSONC Preprocessing:

   • Migration to stripJsonc reliably preserves URLs (e.g. https://...) and comments within string values, while supporting trailing commas.

3. Robust Statement Parsing:

   • stripLeadingWhitespaceAndLineComments guarantees that queries preceded by multi-line or block comments correctly identify the lead statement keyword.