update files

docs/authors.rst

docs/conf.py

docs/data.rst

docs/data/dataset_v1.rst

docs/data/dataset_v2.rst

docs/data/dataset_v3.rst

docs/data/example_trajectory_random_joint.png

docs/data/index.rst

docs/data/trajectory_generation.rst

docs/index.rst

docs/neural_network/architecture.rst

docs/neural_network/freq_analysis.rst

docs/neural_network/hyperparameter.rst

docs/neural_network/index.rst

docs/neural_network/results.rst