Fix: Subquery Indentation

[xterao]

Summary
This PR fixes an issue where subqueries were incorrectly indented under certain conditions, leading to inconsistent SQL formatting.

Details
Indentation inside subqueries is now corrected in the following cases:

• When a subquery is used inside an IN group.
• When a subquery is used with EXISTS.
• When a subquery is used in a condition immediately following WHERE.

Example (after fix):

DELETE FROM user_session s
 WHERE s.count = ( SELECT COUNT(*)
                     FROM user u
                    WHERE u.id = /* id */1
                      AND u.session_id = u.id
                      AND u.time_stamp < /* current */'2099-12-31 00:00:00' )
    OR EXISTS ( SELECT u.id
                  FROM user u
                 WHERE u.id = /* id */1
                   AND u.session_id = u.id
                   AND u.time_stamp < /* current */'2099-12-31 00:00:00' )
   AND s.user_number IN ( SELECT u.number
                            FROM user u
                           WHERE u.status = /* status */'active' )

Impact
This ensures that subqueries within conditions are consistently indented, improving readability and maintaining a uniform SQL style.

[Copilot]

Pull Request Overview

This PR fixes SQL formatting issues where subqueries were not properly indented in specific contexts (IN groups, EXISTS clauses, and WHERE conditions). The fix ensures consistent indentation by refactoring indentation calculation logic and adding proper handling for subqueries in different SQL constructs.

Key changes:

• Refactored indentation calculation by extracting common logic into a shared method
• Added special handling for subqueries in WHERE clauses and conditional expressions
• Added test coverage for DELETE statements with subqueries

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/main/kotlin/org/domaframework/doma/intellij/formatter/block/SqlBlock.kt	Added shared calculatePrevBlocksLength method for consistent indentation calculation
src/main/kotlin/org/domaframework/doma/intellij/formatter/block/word/SqlFunctionGroupBlock.kt	Removed duplicate indentation calculation method
src/main/kotlin/org/domaframework/doma/intellij/formatter/block/group/keyword/option/SqlInGroupBlock.kt	Refactored to use shared indentation calculation method
src/main/kotlin/org/domaframework/doma/intellij/formatter/block/group/keyword/condition/SqlConditionalExpressionGroupBlock.kt	Updated to use shared indentation calculation for better subquery formatting
src/main/kotlin/org/domaframework/doma/intellij/formatter/block/group/keyword/condition/SqlConditionKeywordGroupBlock.kt	Added special handling for WHERE group blocks
src/test/kotlin/org/domaframework/doma/intellij/formatter/SqlFormatterTest.kt	Added test case for DELETE with subquery formatting
src/test/testData/sql/formatter/DeleteWithSubQuery.sql	Test input with poorly formatted subqueries
src/test/testData/sql/formatter/DeleteWithSubQuery_format.sql	Expected output with properly formatted subqueries

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}