Add PR and Issue templates (#22)

* Add PR and Issue templates

* Add MIT license

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: 🐛 Bug report
+description: Create a bug report to help us improve
+title: "[BUG] "
+body:
+  - type: textarea
+    id: describe
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is and steps to reproduce it.
+      placeholder: This is what I'm seeing.
+    validations:
+      required: true   
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: A clear and concise description of what you expected to happen.
+      placeholder: This is what should happen.
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: List the steps to reproduce the behavior
+      placeholder: |
+        1. Run command 'npm install && npm run dev'
+        2. Check debug and log errors
+    validations:
+      required: false
+  - type: textarea
+    id: attachments
+    attributes:
+      label: Additional context
+      description: If applicable, add screenshots, links or other context about the issue
+      placeholder: |
+        Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+    validations:
+      required: false
+  - type: dropdown
+    attributes:
+      label: Operating system
+      description: What type of operating system are you running on?
+      multiple: false
+      options:
+        - Linux
+        - macOS
+        - Windows
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Arka version or commit hash
+      description: Which version or commit hash of Skandha are you running? 
+      placeholder: v0.0.1 or 214ee64
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: Documentation
+    url: https://etherspot.fyi/arka/intro
+    about: For more detailed guide follow our docs
+  - name: Join our Discord community
+    url: https://discord.etherspot.io
+    about: Participate in our thriving community of contributors, users, and supporters.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: "\U0001F680 Feature request"
+about: Suggest an idea/feature for Arka Paymaster
+title: "[FEATURE]"
+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.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/pull_request_template.md

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+<!--- Provide a general summary of your changes in the Title above -->
+## Description
+<!--- Describe your changes in details -->
+-
+
+## Types of changes
+What types of changes does your code introduce?
+<!-- _Put an `x` in the boxes that apply_ -->
+
+- [ ] Bugfix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation Update
+- [ ] Code style update (formatting, renaming)
+- [ ] Refactoring (no functional changes, no api changes)
+- [ ] Build related changes
+- [ ] Other (please describe): 
+
+## Further comments (optional)
+<!--- Additional comments, don't hesitate :) -->
+-

LICENSE

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+MIT License
+
+Copyright (c) 2023 Etherspot
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.