test: add autotests Google Test framework + core/common-module unit tests - #512

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-go@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Include file: <gtest/gtest.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Variable 'hl' is assigned a value that is never used.

Variable 'hl' is assigned a value that is never used.

Include file: <QTextCursor> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QTextDocument> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <gtest/gtest.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Variable 'cfg' can be declared as pointer to const

Variable 'cfg' can be declared as pointer to const

Variable 'cfg' can be declared as pointer to const