Add issue templates (#2855)

* chore: add issue templates

* chore: update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Use this template to report a bug in this project
+title: ""
+labels: Bug
+---
+
+<!--
+
+In order for us to better investigate the bug, please fill in as much relevant information as is reasonable in the format below.
+
+Before proceeding, consider the following:
+
+- This repository is for issues with Apicurio Registry. Make sure the bug report is not more appropriate or another repository.
+- Make sure the bug is in Apicurio Registry and not in an external library or other non-Apicurio software.
+ For example, we provide a compatibility REST API for Confluent Schema Registry clients. Make sure the bug is not in one of their libraries.
+- Run the Registry with DEBUG logging enabled, by passing the LOG_LEVEL=DEBUG env. variable.
+
+-->
+
+## Description
+
+**Registry
+Version**: <!-- Please add the Apicurio Registry version number here. You can use "latest" for the latest released version, or "snapshot" if you are using a build from main. -->
+**Persistence type**: <!-- Please add the persistence type here. One of "in-memory", "sql", or "kafkasql". -->
+
+<!-- Please provide as much detail about the bug as possible. -->
+
+### Environment
+
+<!-- 
+What is the environment in which you are running Apicurio Registry? e.g. Kubernetes v1.25. 
+How are you interacting with Apicurio Registry? Are you using a specific serdes client? Please include its version.
+-->
+
+### Steps to Reproduce
+
+<!--
+Add the steps required to reproduce this error.
+
+1. Go to `XX >> YY >> SS`
+2. Create a new item `N` with the info `X`
+3. See error
+
+If the error cannot be easily reproduced, make sure to fill in the Environment and Logs sections.
+You can also try to reproduce the bug with a fresh Apicurio Registry instance.
+-->
+
+### Expected vs Actual Behaviour
+
+<!-- A clear and concise description of what you expected to happen and what actually happened. -->
+
+### Logs
+
+<!-- Paste or link the logs from Registry, browser console, your command line or other relevant places. Redact if needed.-->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: "Feature request"
+about: Propose a feature request that you think will improve this project
+title: ''
+labels: Enhancement
+assignees: ''
+---
+
+### Feature or Problem Description
+
+<!-- A clear and concise description of what the feature or problem is. -->
+
+### Proposed Solution
+
+<!-- How will it benefit the Apicurio Registry and its users? -->
+
+### Additional Context
+
+<!-- Add any other context like screenshots or mockups, if applicable. -->