Interpreter for deferred execution

processing issues https://git.scc.kit.edu/virtmat-tools/vre-language/-/issues/6 and https://git.scc.kit.edu/virtmat-tools/vre-language/-/issues/23

Implemented:

• mode-of-evaluation
• implementation-strategy-for-func-property-methods
• deferred-execution-of-lambda-functions-and-expressions

Partially implemented:

• implementation-strategy-for-the-firetaskfirework-construction
• optimal-wrapping-python-functions-into-firetasks

Not implemented:

• provide-the-source-code-to-the-interpreter
• provide-a-program-instance-to-the-interpreter
• use-directives-to-manipulate-_tx_model_params
• io-operations-in-deferred-remote-evaluation
• task-node-and-data-granularity