Finish MaxMath 2.0.1 release

[ParuhParhat]

What changed

• Finalizes the MaxMath 2.0.1 Octave plotting and Signal/Control support, including stem, imagesc, caxis, scrolling multi-plot pages, and runtime/package verification.
• Replaces mixed icon sources with 33 tested Claude-style SVG/Compose icons, stateful action feedback, RTL navigation, and a new warm M² launcher mark.
• Updates tests, bilingual documentation, third-party notices, and release notes for the complete 2.0.1 package.

Why

This release fixes matrix trace stalls, improves Octave 3D and multi-plot behavior, expands offline MATLAB-compatible workflows, and makes the application icon language consistent and accessible.

User impact

Users get more reliable Maxima/Octave calculations, additional plotting commands and Signal tools, clearer multi-subplot navigation, and consistent state-aware controls throughout the app.

Validation

• ./gradlew test :app:assembleRelease :app:lintRelease
• Release APK version: 2.0.1 (versionCode 21)
• APK Signature Scheme v2 verification passed
• APK SHA-256: 08EF48E3E7635EB24B929DAD82DF149E49A46C7DED5AA31982A5654360F0EE3B
• git diff --check