Support inspection in all commands that accept B formulas

src/main/java/de/prob2/jupyter/commands/AssertCommand.java

src/main/java/de/prob2/jupyter/commands/CommandUtils.java

...main/java/de/prob2/jupyter/commands/ConstantsCommand.java

src/main/java/de/prob2/jupyter/commands/DotCommand.java

src/main/java/de/prob2/jupyter/commands/ExecCommand.java

src/main/java/de/prob2/jupyter/commands/FindCommand.java

...ain/java/de/prob2/jupyter/commands/InitialiseCommand.java

src/main/java/de/prob2/jupyter/commands/LoadCellCommand.java

...in/java/de/prob2/jupyter/commands/PrettyPrintCommand.java

src/main/java/de/prob2/jupyter/commands/SolveCommand.java

src/main/java/de/prob2/jupyter/commands/TableCommand.java

src/main/java/de/prob2/jupyter/commands/TimeCommand.java

src/main/java/de/prob2/jupyter/commands/TypeCommand.java