fix: pack reads files in binary mode to prevent trimming on Windows

[cristipufu]

Summary

• Read all files in binary mode during pack ("rb" instead of "r"), preventing Python's universal newline translation from silently converting \r\n → \n on Windows, which caused files to appear "trimmed"
• Normalize zip entry paths to use forward slashes on Windows (previously used OS-native backslashes, producing non-standard zip entries like content/subfolder\file.py)
• Bump version to 2.10.2

Test plan

• All 1551 existing tests pass
• Pack a project on Windows with LF line endings (e.g., from Cursor) and verify file content in the nupkg is byte-identical to the originals
• Pack a project with files in subdirectories on Windows and verify zip entries use forward slashes

🤖 Generated with Claude Code

Development Package

• Use uipath pack --nolock to get the latest dev build from this PR (requires version range).
• Add this package as a dependency in your pyproject.toml:

[project]
dependencies = [
  # Exact version:
  "uipath==2.10.2.dev1013895091",

  # Any version from PR
  "uipath>=2.10.2.dev1013890000,<2.10.2.dev1013900000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath = { index = "testpypi" }

[tool.uv]
override-dependencies = [
    "uipath>=2.10.2.dev1013890000,<2.10.2.dev1013900000",
]