add issue templates for better issue management

.github/ISSUE_TEMPLATE/bug.yml

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+name: Bug Report
+description: File a bug report
+title: "[Bug]: "
+labels: []
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before opening a bug report, please search for the behaviour in the existing issues.
+
+        ---
+
+        Thank you for taking the time to file a bug report. To address this bug as fast as possible, we need some information.
+  - type: dropdown
+    id: arch
+    attributes:
+      label: System architecture
+      description: "Which operating system architecture are you using?"
+      options:
+        - Mac, Intel (x86)
+        - Mac, ARM64 (M1, M2, etc)
+        - Windows
+        - Linux
+    validations:
+      required: true
+  - type: input
+    id: php
+    attributes:
+      label: PHP Version
+      description: "If your problem only occurs with a certain PHP version, please provide it in the field below."
+      placeholder: "PHP 8.2.8 (cli) (built: Jul  7 2023 00:11:29) (NTS)"
+    validations:
+      required: false
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Bug description
+      description: What happened and what did you expect to happen?
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: Which steps do we need to take to reproduce this error?
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: If applicable, provide relevant log output. No need for backticks here.
+      render: shell

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Check the docs
+    url: https://expose.dev/docs/introduction
+    about: "This repository contains the open source version of Expose. Please contact our email support if you have issues with our network or Expose Pro!"
+  - name: Security vulnerabilities
+    url: https://@beyondco.de
+    about: If you want to report a security issue, please contact our support.

.github/ISSUE_TEMPLATE/feature.yml

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+name: Feature Request
+description: Propose a new feature for Herd
+title: "[Feature Request]: "
+labels: [feature request]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for suggesting a feature for the Expose open source version!
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: Feature Description
+      description: How should this feature look like?
+    validations:
+      required: true
+  - type: textarea
+    id: valuable
+    attributes:
+      label: Is this feature valuable for other users as well and why?
+      description: We want to build software that provides a great experience for all of us.