docs: added issue template to fhevmjs

.github/ISSUE_TEMPLATE/bug_report_fhevmjs.md

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+---
+name: 🐛 fhevmjs Bug report
+about: Use this template to report issues encountered while using the fhevmjs library for interacting with fhEVM smart contracts.
+title: ""
+labels: bug, fhevmjs
+assignees: ""
+---
+
+### **Description**
+
+Provide a clear and detailed description of the issue encountered.
+
+### **Expected Behavior**
+
+A clear and concise description of the expected behavior (e.g., successful encryption of parameters, correct reencryption result, accurate balance retrieval).
+
+### **Screenshots / Logs**
+
+If applicable, provide screenshots or logs that capture the issue. Include any console errors, warnings, or unexpected outputs.
+
+### **Environment Information**
+
+Fill in the relevant environment details where the issue was observed:
+
+- **Browser**: [e.g., Chrome v90, Firefox v88]
+- **Node.js Version**: [e.g., `v14.17.0`]
+- **`fhEVMjs` Version**: [e.g., `v0.2.1`]
+- **Package Manager**: [npm, yarn, pnpm]
+- **Network Configuration**:
+  - **Chain ID**: [e.g., `9000`]
+  - **RPC URL**: [e.g., `https://devnet.zama.ai`]
+  - **Gateway URL**: [e.g., `https://gateway.devnet.zama.ai`]
+
+### **Steps Taken to Debug**
+
+Outline any steps you’ve taken to troubleshoot the issue (e.g., using mocked mode, enabling verbose logging, testing with a different environment or network).
+
+### **Resources / References**
+
+If applicable, include links to any related documentation or reference materials that may help us understand the context:
+
+<details><summary>Logs or output</summary>
+<p>
+
+```console
+
+```
+
+</p>
+</details>
+
+---
+
+By including these details, we can ensure a faster and more accurate resolution for your issue. Thank you for helping improve `fhevmjs`!

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: 🚀 General feature request for fhEVM
+about: Suggest an idea for this project
+title: ""
+labels: enhancement
+assignees: ""
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.