added github templates + CODEOWNERS

.github/CODEOWNERS

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+*       @oceanprotocol/maintainers @oceanprotocol/core-dev

.github/issue_template.md

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+# Prerequisites
+
+Please answer the following questions for yourself before submitting an issue. **YOU MAY DELETE THE PREREQUISITES SECTION.**
+
+- [ ] I am running the latest version
+- [ ] I checked the documentation and found no answer
+- [ ] I checked to make sure that this issue has not already been filed
+- [ ] I'm reporting the issue to the correct repository.
+
+## Expected Behavior
+
+Please describe the behavior you are expecting
+
+## Current Behavior
+
+What is the current behavior? Please provide as many details as possible.
+
+## Failure Information (for bugs)
+
+Please help provide information about the failure if this is a bug. If it is not a bug, please remove the rest of this template.
+
+## Step to Reproduce the problem
+
+Please provide detailed steps for reproducing the issue.
+
+1.
+2.
+3.
+
+### Possible Solution
+
+Fill this section in if you know how this could or should be fixed.
+
+## Specifications
+
+Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.
+
+* Version: x.x.x
+* Python: x.x
+* Solidity: x.x.x
+* JavaScript: x.x.x
+* Node: x.x.x
+* OS: macOS/linux/win
+
+## Failure Logs
+
+Please include any relevant log snippets or files here.

.github/pull_request_template.md

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+## Description
+
+Add a description of your changes here.
+
+## Is this PR related with an open issue?
+
+Related to Issue #
+
+## Types of changes
+
+- [ ] Bug fix (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 change)
+ 
+## Checklist:
+
+- [ ] Follows the code style of this project.
+- [ ] Tests Cover Changes
+- [ ] Documentation
+
+#### Funny gif
+
+![Put a link of a funny gif inside the parenthesis-->]()