Add unit tests for PDF Packager converter functionality

- Implement tests for converter properties, ensuring correct input and output formats.
- Add tests for chip parsing, covering various image, pdf_image, and pdfa chip formats.
- Include tests for the isArchiveOutput and getOutputFileName functions.
- Mock execFile for testing the convert function, verifying command execution and output file creation.
- Ensure all chips are parseable and validate the completeness of chip categories.

LICENSE-AUTHOR

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+# ConvertX-CN Author License
+
+# Custom Non-Commercial License for Original Components
+
+Copyright (c) 2024-2026 ConvertX-CN Author (pi-docket)
+
+## Definitions
+
+- "Original Components" refers to all code, UI designs, i18n translations,
+  documentation, and features created specifically for ConvertX-CN that are
+  NOT derived from the upstream ConvertX project.
+- "Commercial Use" includes but is not limited to:
+  - Selling or licensing the software
+  - Using the software as part of a paid SaaS offering
+  - Using the software in a revenue-generating business context
+  - Incorporating the software into a commercial product
+
+## Grant of Rights
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of the Original Components, to use, copy, modify, and distribute for:
+
+1. **Personal Use** ✅ - Using for personal, non-commercial purposes
+2. **Educational Use** ✅ - Using for learning, teaching, or academic research
+3. **Non-Commercial Research** ✅ - Using for scientific or technical research
+   without commercial intent
+
+## Restrictions
+
+The following uses are **PROHIBITED** without explicit written permission:
+
+1. ❌ Commercial use of any kind
+2. ❌ SaaS deployment for paying customers
+3. ❌ Integration into commercial products or services
+4. ❌ Reselling or sublicensing
+
+## Commercial Licensing
+
+If you wish to use the Original Components for commercial purposes, you must
+obtain a commercial license from the author.
+
+### Contact for Commercial Licensing
+
+- **GitHub**: https://github.com/pi-docket
+- **Issues**: https://github.com/pi-docket/ConvertX-CN/issues
+- **Discussions**: https://github.com/pi-docket/ConvertX-CN/discussions
+
+Please open an issue or discussion with the title "[Commercial License Request]"
+to initiate the licensing process.
+
+## Disclaimer
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+## Relationship with AGPL-3.0
+
+This license applies ONLY to the Original Components created by the
+ConvertX-CN author. All upstream components derived from C4illin/ConvertX
+remain licensed under GNU AGPL v3.0, and those obligations still apply.