chore: [DevOps] Add Pretty Issue Templates

.github/ISSUE_TEMPLATE/bug-report.yml

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+name: Bug Report
+description: Released feature does not work as expected in the SAP Cloud SDK for Java.
+labels:
+  - bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This repository is for Java related issues only. Please open [JavaScript / TypeScript issues here](https://github.com/SAP/cloud-sdk-js/issues/new/choose)
+  - type: textarea
+    attributes:
+      label: "Describe the Bug"
+      description: "A clear and concise description of what the bug is."
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Steps to Reproduce"
+      description: "Steps to reproduce the behavior."
+      placeholder: |
+        1. Set up ...
+        2. Execute ...
+        3. Confirm ...
+        4. See error
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Expected Behavior"
+      description: "A clear and concise description of what you expected to happen. In case of HTTP requests, a working Postman (or similar) request is very helpful."
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Screenshots"
+      description: "Add screenshots to help explain your problem."
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: "Used Versions"
+      description: "Provide versions used in the project."
+      value: |
+        - Java and Maven version via `mvn --version`: ...
+        - SAP Cloud SDK version: ...
+        - Spring Boot or CAP version: ...
+        - <details><summary>Dependency tree via `mvn dependency:tree`</summary>
+
+            ```
+            Dependency tree here
+            ```
+          </details>
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Code Examples"
+      description: "Add code snippets as examples to help explain your problem. Please remove sensitive information."
+      value: |
+        ```java
+        // Your code here
+        ```
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: "Stack Trace"
+      description: "Add your stack trace here. Please remove sensitive information."
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: "Log File"
+      description: "Add your log file or related error message. Please remove sensitive information."
+      value: |
+        <details><summary>Log file</summary>
+        ...
+        </details>
+    validations:
+      required: false
+  - type: dropdown
+    attributes:
+      label: "Affected Development Phase"
+      description: "Choose the development phase affected by this issue."
+      multiple: false
+      options:
+        - Getting Started
+        - Development
+        - Release
+        - Production
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: "Impact"
+      description: "Choose the impact severity."
+      multiple: false
+      options:
+        - No Impact
+        - Inconvenience
+        - Impaired
+        - Blocked
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Timeline"
+      description: "Please briefly state your timeline, e.g., Go-Live in 12 weeks."
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: Feature Request
+description: Request a new feature to help your project using the SAP Cloud SDK for Java.
+labels:
+  - feature request
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This repository is for Java related issues only. Please open [JavaScript / TypeScript issues here](https://github.com/SAP/cloud-sdk-js/issues/new/choose)
+  - type: textarea
+    attributes:
+      label: "Describe the Problem"
+      description: "A clear and concise description of what the missing feature is"
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Propose a Solution"
+      description: "A clear and concise description of what you want to happen. In case of HTTP requests, a working Postman (or similar) request is very helpful."
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Describe Alternatives"
+      description: "A clear and concise description of any alternative solutions or features you've considered."
+    validations:
+      required: false
+  - type: dropdown
+    attributes:
+      label: "Affected Development Phase"
+      description: "Choose the development phase affected by this issue."
+      multiple: false
+      options:
+        - Getting Started
+        - Development
+        - Release
+        - Production
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: "Impact"
+      description: "Choose the impact severity."
+      multiple: false
+      options:
+        - No Impact
+        - Inconvenience
+        - Impaired
+        - Blocked
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Timeline"
+      description: "Please briefly state your timeline, e.g., Go-Live in 12 weeks."
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/question.yml

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+name: Question
+description: Ask a question about the SAP Cloud SDK for Java.
+labels:
+  - question
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This repository is for Java related issues only. Please open [JavaScript / TypeScript issues here](https://github.com/SAP/cloud-sdk-js/issues/new/choose)
+  - type: textarea
+    attributes:
+      label: "Ask the Question"
+      description: Give  a clear and concise description.
+    validations:
+      required: true