Feature Request: Add Support for LibreOffice Calc and Numbers Formats in DRL Parsers

[Rashmesh]

Feature Request: Add Support for LibreOffice Calc and Numbers Formats in DRL Parsers

Current Situation:
The DRL parsers in the Apache Incubator KIE Drools project currently only support the XLS format for spreadsheets. This limitation presents two main issues:

1. The supported XLS format is outdated, leading to frequent upgrade prompts.
2. Users are restricted to using Microsoft Excel, a paid software solution.

Proposed Change:
We propose expanding the DRL parsers' compatibility to include:

1. LibreOffice Calc (https://www.libreoffice.org/discover/calc/)
2. Apple Numbers (https://en.wikipedia.org/wiki/Numbers_(spreadsheet))

Rationale:
Implementing support for these additional spreadsheet formats would bring several benefits:

1. Increased Compatibility: Users would have more options for creating and editing spreadsheets compatible with DRL parsers.

2. Wider User Base: By supporting open-source and alternative spreadsheet applications, we can attract users who prefer or are required to use non-Microsoft solutions.

3. Cost Reduction: Removing the dependency on Microsoft Excel allows users to utilize free, open-source alternatives, potentially reducing software costs for individuals and organizations.

4. Modern Format Support: This update would address the current issue of prompts to upgrade from the outdated XLS format.

5. Cross-Platform Accessibility: LibreOffice Calc is available on multiple operating systems, while Numbers caters to the macOS and iOS ecosystems, broadening the project's reach.

Implementation Considerations:

• The parsing logic may need to be adapted to handle the specific file formats of LibreOffice Calc (.ods) and Numbers (.numbers).
• Compatibility testing will be crucial to ensure consistent behavior across all supported formats.
• Documentation updates will be necessary to inform users about the new supported formats.

I believe this enhancement will significantly improve the flexibility and accessibility of the Apache Incubator KIE Drools project, aligning it with modern spreadsheet usage patterns and open-source principles.