feat: add windows exe build pipeline and fix bundled template path

[ThiruNithish28]

🚀 Summary

This PR adds support for building a Windows executable for AuditGen CLI using PyInstaller and fixes issues with bundled template file path.

✨ Changes Made

• Added PyInstaller setup for generating a standalone .exe
• Configured build pipeline for Windows executable packaging
• Fixed template file path resolution when bundled inside executable
• Updated project Python version constraints for PyInstaller compatibility (<3.15)
• Improved handling of resource paths for packaged environments

🧪 Tested

• Built .exe using PyInstaller
• Verified CLI runs correctly from executable
• Confirmed template files are correctly accessed in bundled mode
• Tested normal (non-bundled) CLI flow as well

⚠️ Notes

• This change is specific to Windows executable builds
• Future improvements may include cross-platform packaging support

📦 Outcome

Users can now run AuditGen CLI as a standalone Windows executable without requiring Python setup.

Summary by CodeRabbit

• New Features

  • Automated Windows executable build workflow enables streamlined distribution.

• Bug Fixes

  • Fixed template resolution in packaged executables to ensure proper functionality.

• Chores

  • Updated Python version constraints (3.12 to <3.15) and added build tool dependencies.

[coderabbitai]

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Actionable comments posted: 4

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In @.github/workflows/build.yml:
- Around line 3-6: The workflow currently triggers only on push to branch "main"
(see on: push branches: [main] and workflow_dispatch), so it never runs for
changes pushed to "develop"; update the triggers to include "develop" (e.g., add
it to the push branches array) or add a pull_request trigger for target branches
(or both) so CI runs for PRs targeting develop/main; modify the on: section
accordingly to include the desired branches/PR events.
- Line 22: Replace the unpinned install command "pip install poetry" in the
workflow step with a pinned version that guarantees PEP 735 support (e.g.
install Poetry 2.3.0 or a constrained range); update the run step to use a
specific version specifier such as "pip install 'poetry>=2.3.0,<3.0.0'" so the
CI consistently uses a Poetry release that supports dependency groups.

In `@audigen_cli/excelWriter.py`:
- Around line 7-10: The _get_base_path function uses sys.MEIPASS which is
incorrect for PyInstaller; change references to sys._MEIPASS and guard access
with hasattr or getattr to avoid AttributeError when not frozen (e.g., use
getattr(sys, '_MEIPASS', None) or hasattr(sys, '_MEIPASS')), so _get_base_path()
returns Path(sys._MEIPASS) when frozen and the normal project folder otherwise;
update any related module-level uses (such as _TEMPLATES evaluation) to rely on
the fixed _get_base_path.

In `@pyproject.toml`:
- Around line 29-31: Add a pinned entry for pyinstaller-hooks-contrib alongside
the existing pyinstaller dev dependency in pyproject.toml: match the version
bounds to pyinstaller (e.g., "pyinstaller-hooks-contrib (>=6.20.0,<7.0.0)") so
both packages are upgraded together and avoid compatibility breakage between
pyinstaller and pyinstaller-hooks-contrib.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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Configuration used: Organization UI

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Run ID: b2500a67-d533-4956-91e5-8cfc948a0d76

📥 Commits

Reviewing files that changed from the base of the PR and between 0f6e51e and d8b3ddb.

⛔ Files ignored due to path filters (1)

• poetry.lock is excluded by !**/*.lock

📒 Files selected for processing (3)

• .github/workflows/build.yml
• audigen_cli/excelWriter.py
• pyproject.toml