feat: schema-first Office Skills Pack (Excel, PPTX, DOCX) + finance example

[anand-kumar7890]

Description

Implements a schema-first Office Skills Pack for local generation of:

• Excel (.xlsx)
• PowerPoint (.pptx)
• Word (.docx)

This enables Hive agents to produce enterprise-ready artifacts instead of only Markdown/JSON outputs.

Includes a finance use-case example (AAPL vs MSFT drawdown analysis) demonstrating:

• Data processing (pandas)
• Excel export with multiple sheets
• PowerPoint deck generation (charts + tables)
• Word summary report export

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Type of Change

• New feature (non-breaking change that adds functionality)
• Bug fix
• Breaking change
• Documentation update

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Related Issues

Fixes #5062

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Changes Made

• Added office_tool package under tools/src/aden_tools/tools/
  • excel_core.py
  • powerpoint_core.py
  • word_core.py
  • schemas.py
  • export_utils.py
• Integrated tool registration into register_all_tools
• Added schema-first validation using Pydantic
• Added finance example:
  • examples/finance_aapl_msft_example.py
• Added comprehensive tests:
  • Excel generation
  • PowerPoint (charts + tables)
  • Word generation
• Removed generated export binaries from repo
• Ensured compatibility with upstream dynamic tool registry

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closes#5062

Testing

Validated locally:

pytest tools/tests/tools/test_office_generation.py