[Feature][X2SeaTunnel] Add X2SeaTunnel tool

[Adamyuanyuan]

Purpose of this pull request

X2SeaTunnel is a tool for converting DataX and other configuration files to SeaTunnel configuration files, designed to help users quickly migrate from other data integration platforms to SeaTunnel.
This is the implementation of the first version.

Does this PR introduce any user-facing change?

Added a new tool with the following functions:

• ✅ Standard Configuration Conversion: DataX → SeaTunnel configuration file conversion
• ✅ Custom Template Conversion: Support for user-defined conversion templates
• ✅ Detailed Conversion Reports: Generate Markdown format conversion reports
• ✅ Regular Expression Variable Extraction: Extract variables from configuration using regex, supporting custom scenarios
• ✅ Batch Conversion Mode: Support directory and file wildcard batch conversion, automatic report and summary report generation

Basic Usage

# Standard conversion: Use default template system with built-in common Sources and Sinks
./bin/x2seatunnel.sh -s examples/source/datax-mysql2hdfs.json -t examples/target/mysql2hdfs-result.conf -r examples/report/mysql2hdfs-report.md

# Custom task: Implement customized conversion requirements through custom templates
# Scenario: MySQL → Hive (DataX doesn't have HiveWriter)
# DataX configuration: MySQL → HDFS Custom task: Convert to MySQL → Hive
./bin/x2seatunnel.sh -s examples/source/datax-mysql2hdfs2hive.json -t examples/target/mysql2hive-result.conf -r examples/report/mysql2hive-report.md -T templates/datax/custom/mysql-to-hive.conf

# YAML configuration method (equivalent to above command line parameters)
./bin/x2seatunnel.sh -c examples/yaml/datax-mysql2hdfs2hive.yaml

# Batch conversion mode: Process by directory
./bin/x2seatunnel.sh -d examples/source -o examples/target2 -R examples/report2

# Batch mode supports wildcard filtering
./bin/x2seatunnel.sh -d examples/source -o examples/target3 -R examples/report3 --pattern "*-full.json" --verbose

# View help
./bin/x2seatunnel.sh --help

Conversion Report

After conversion is completed, view the generated Markdown report file, which includes:

• Basic Information: Conversion time, source/target file paths, connector types, conversion status, etc.
• Conversion Statistics: Counts and percentages of direct mappings, smart transformations, default values used, and unmapped fields
• Detailed Field Mapping Relationships: Source values, target values, filters used for each field
• Default Value Usage: List of all fields using default values
• Unmapped Fields: Fields present in DataX but not converted
• Possible Error and Warning Information: Issue prompts during conversion process

For batch conversions, a batch summary report summary.md will be generated in the batch report directory, including:

• Conversion Overview: Overall statistics, success rate, duration, etc.
• Successful Conversion List: Complete list of successfully converted files
• Failed Conversion List: Failed files and error messages (if any)

How was this patch tested?

Yes, including unit tests, local tests, and production tests.

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs

[Adamyuanyuan]

apache/seatunnel#9507

[Hisoka-X]

Please revert this. We should use sub module seatunnel as dependency, not release version.

[Hisoka-X]

use sub module seatunnel.

[Adamyuanyuan]

ok, thanks