Added issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Something isn't working as expected
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Prerequisites
+Please make sure to check off these prerequisites before submitting a bug report.
+- [ ] Test that the bug appears on the current version of the dev-branch. Make sure to include the commit hash of the commit you checked out.
+- [ ] Check that the issue hasn't already been reported, by checking the currently open issues.
+- [ ] If there are steps to reproduce the problem, make sure to write them down below.
+- [ ] If relevant, please include the ONNX files, which were created directly before and/or after the bug.
+
+## Quick summary
+Please give a brief and concise description of the bug.
+
+## Details
+Please add to the following sections to describe the bug as accurately as possible.
+
+### Steps to Reproduce
+Add what needs to be done to reproduce the bug. Add code examples where useful. For build scripts, [saving](https://finn-dev.readthedocs.io/en/latest/source_code/finn.builder.html#finn.builder.build_dataflow_config.DataflowBuildConfig.save_intermediate_models) the intermediate (and resulting) ONNX models and including them here is extremely useful.
+
+#### For example notebooks:
+1. Set up the [...] board using the following image: [...]
+2. Install the finn-examples package with the following commands: [...]
+3. Run notebook [...] on the [...] board with the following commands: [...]
+4. [Further steps ...]
+
+#### For build scripts:
+1. Clone the FINN-Examples repository
+2. Checkout the dev branch, with commit hash: [...]
+3. Start the docker container with the command: [...]
+4. Run the build script [...] with the following commands: [...]
+5. [Further steps ...]
+
+### Expected behavior
+Please add a brief description of what you expected to happen.
+
+### Actual behavior
+Describe what actually happens instead.
+
+## Optional
+
+### Possible fix
+If you already know where the issue stems from, or you have a hint please let us know.
+
+### Additional context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Getting started with FINN
+    url: https://finn.readthedocs.io/en/latest/getting_started.html
+    about: Documentation about how to get up and running with FINN.
+  - name: Ask for help and get in touch with the community
+    url: https://github.com/Xilinx/finn/discussions
+    about: Check out our GitHub Discussions, if you have a question about FINN or a general problem that is likely not a bug.

.github/ISSUE_TEMPLATE/documentation-fix.md

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+---
+name: Documentation fix
+about: For incorrect, hard to understand, or oudated documentation
+title: ''
+labels: documentation
+assignees: ''
+
+---
+
+## Prerequisites
+Please make sure to check that your suggested documentation fix is not already being worked on, by checking the open issues. You can also check to see if it's fixed on the most recent version of the `/dev` branch.
+
+Even if an idea is already being worked on you can still create an documentation fix request,
+if you would like to open a discussion about the documentation, or want to contribute to it.
+
+## Details
+Please add to the following sections to describe the fix as accurately as possible.
+
+### Suggested change(s)
+Please add a brief and concise description of your suggested changes to FINN-Examples' documentation. Describe where the documentation is you're changing, as well as how you're changing it.
+
+### Motivation
+Please tell us why you think the old documentation wasn't doing its job. What are you fixing by changing it?

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for FINN-Examples
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+## Prerequisites
+Please make sure to check that the idea is not already being worked on
+by looking at the currently open issues and the [project Kanbans](https://github.com/Xilinx/finn-examples/projects).
+
+Even if an idea is already being worked on you can still create a feature request,
+if you would like to open a discussion about the feature or want to contribute to it.
+
+## Details
+Please add to the following sections to describe the feature as accurately as possible.
+
+### New behavior
+Please add a brief and concise description of what you would like to be added to FINN-Examples in the future.
+
+### Motivation
+Please tell us why this feature is important to the FINN community.
+
+### Parts of FINN-Examples affected
+Please describe which parts of FINN-Examples would be affected by this feature.