Prepare v0.4 release and open source docs

CODE_OF_CONDUCT.md

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+# Code Of Conduct
+
+This project expects direct, respectful, technical collaboration.
+
+## Expected Behavior
+
+- Be clear and constructive.
+- Focus criticism on code, behavior, documentation, and project direction.
+- Assume contributors may have different experience levels and constraints.
+- Respect maintainer decisions about scope, release timing, licensing, and App Store distribution.
+
+## Unacceptable Behavior
+
+- Harassment, threats, insults, or discriminatory language.
+- Personal attacks in issues, pull requests, discussions, commits, or reviews.
+- Publishing private information without permission.
+- Repeatedly pushing a rejected change without new technical evidence.
+
+## Enforcement
+
+Maintainers may edit, hide, or remove comments; close issues or pull requests; block participants; or restrict repository access when behavior harms the project.
+
+Report conduct issues through the product support page:
+
+<https://www.akkolli.net/ihatepdfs>