Bracket limit and enhance run in db2

[buzzia2001]

Changes

This PR adds a limit to the bracket matcher, set to 6000 by default. When that limit is exceeded, the mechanism will not work. Additionally, in SQLRPGLE source files that begin with **FREE, the RUN IN DB2 FOR I action will now also be present for statements other than SELECT, etc.

How to test

1. Open a source file with more than 6000 rows or change Vscode-rpgle: Bracket Highlighting Max Lines
2. Create a SQLRPGLE with this content, you'll see a lamp with RUN IN DB2 FOR I:

**FREE

EXEC SQL 
    SELECT * FROM DB.FILE;

EXEC SQL 
    VALUES 'DBFILE';

EXEC SQL 
    CALL DB.FILE();

EXEC SQL
    INSERT INTO DB.FILE
    VALUES('CIAODB');

EXEC SQL
    DELETE FROM DB.FILE;

EXEC SQL
    UPDATE DB.FILE;

Checklist

• have tested my change
• updated relevant documentation
• Remove any/all console.logs I added
• eslint is not complaining
• have added myself to the contributors' list in the README

[github-actions]

👋 A new build is available for this PR based on 78d7088.

• Download here.
• Read more about how to test

[buzzia2001]

@bobcozzi any plan for this one?