Merge branch 'main' into 'Kasutajaliides'

# Conflicts:
#   src/main/java/ee/ut/cs/gitlab/maikov/expressions/MatrixValue.java
#   src/main/java/ee/ut/cs/gitlab/maikov/expressions/Number.java
#   src/main/java/ee/ut/cs/gitlab/maikov/expressions/Value.java
#   src/main/java/ee/ut/cs/gitlab/maikov/matrix/Matrix.java