Met4FoF/agentMET4FOF: Noise and jitter generation plus some convenience improvements

These changes have been applied: Feature Plots: Adapt dashboard such that all agents of types MonitorAgent and MetrologicalMonitorAgent get plotted regardless of their name (67a2544) network: Introduce a method agents_by_type to query for agents of a given type (e43a5b9) Fix Allow spaces in agents' names which get replaced by underscores for the osBrain backend (2d8437d) Refactor AgentNetwork: Change some of the internal variable (06c9a36) SineGeneratorAgent: Improve data sending by including actually computed time (87c3e34) signal_agents: Introduce "official" _sine_stream instance variable for SineGeneratorAgent (98d0f19) signal_agents: Reintroduce NoiseAgent placeholder after module refactorization (f97f4d9) Documentation network: Introduce some more type hints (ee4b158) See all commits in this versio