📝 added project acknowledgements (#317)

## Description

This PR adds project acknowledgements to the README and the
documentation footer.

## Checklist:

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- [x] The pull request only contains commits that are related to it.
- [x] I have added appropriate tests and documentation.
- [x] I have made sure that all CI jobs on GitHub pass.
- [x] The pull request introduces no new warnings and follows the
project's style guidelines.

---------

Signed-off-by: burgholzer <burgholzer@me.com>

README.md

@@ -15,7 +15,7 @@
 
 # MQT DDSIM - A quantum circuit simulator based on decision diagrams written in C++
 
-A tool for classical quantum circuit simulation developed as part of the [_Munich Quantum Toolkit_](https://mqt.readthedocs.io) (_MQT_)[^1] by the [Chair for Design Automation](https://www.cda.cit.tum.de/) at the [Technical University of Munich](https://www.tum.de/).
+A tool for classical quantum circuit simulation developed as part of the [_Munich Quantum Toolkit_](https://mqt.readthedocs.io) (_MQT_) by the [Chair for Design Automation](https://www.cda.cit.tum.de/) at the [Technical University of Munich](https://www.tum.de/).
 It builds upon [MQT Core](https://github.com/cda-tum/mqt-core), which forms the backbone of the MQT.
 
 <p align="center">
@@ -74,4 +74,28 @@ DDSIM has been developed based on methods proposed in the following papers:
 - L. Burgholzer, A.Ploier, and R. Wille, "[Exploiting Arbitrary Paths for the Simulation of Quantum Circuits with Decision Diagrams](https://www.cda.cit.tum.de/files/eda/2022_date_exploiting_arbitrary_paths_simulation_quantum_circuits_decision_diagrams.pdf)," in Design, Automation and Test in Europe (DATE), 2022
 - T. Grurl, J. Fuß, and R. Wille, "[Noise-aware Quantum Circuit Simulation With Decision Diagrams](https://www.cda.cit.tum.de/files/eda/2022_tcad_noise-aware_quantum_circuit_simulation_with_decision_diagrams.pdf)," Transactions on CAD of Integrated Circuits and Systems (TCAD), 2022.
 
-[^1]: The Munich Quantum Toolkit was formerly known under the acronym _JKQ_ and developed by the [Institute for Integrated Circuits](https://iic.jku.at/eda/) at the [Johannes Kepler University Linz](https://jku.at)).
+---
+
+## Acknowledgements
+
+The Munich Quantum Toolkit has been supported by the European
+Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement
+No. 101001318), the Bavarian State Ministry for Science and Arts through the Distinguished Professorship Program, as well as the
+Munich Quantum Valley, which is supported by the Bavarian state government with funds from the Hightech Agenda Bayern Plus.
+
+<p align="center">
+<picture>
+<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/tum_dark.svg" width="28%">
+<img src="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/tum_light.svg" width="28%">
+</picture>
+<picture>
+<img src="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/logo-bavaria.svg" width="16%">
+</picture>
+<picture>
+<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/erc_dark.svg" width="24%">
+<img src="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/erc_light.svg" width="24%">
+</picture>
+<picture>
+<img src="https://raw.githubusercontent.com/cda-tum/mqt-core/main/docs/_static/logo-mqv.svg" width="28%">
+</picture>
+</p>

docs/source/_static/custom.css

@@ -0,0 +1,22 @@
+.acknowledgements {
+  margin-top: 1rem;
+  padding-bottom: 1rem;
+  padding-top: 1rem;
+  border-top: 1px solid var(--color-background-border);
+  font-size: var(--font-size--small);
+  color: var(--color-foreground-secondary);
+}
+
+.acknowledgements-logos {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
+  grid-gap: 1em;
+  align-items: center;
+  margin-top: 0.5rem;
+}
+.acknowledgement {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}