[libad9361-iio-v0]Add CODEOWNERS and PULL_REQUEST_TEMPLATE files

.github/CODEOWNERS

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+# This document lists the code owners for libad9361-iio repo sources, being used
+# whenever new Pull Requests are created.
+#  - People listed in CODEOWNERS are automatically added as reviewers to all
+#    PRs open to branches containing this file, depending on the changed folders.
+#  - In addition to Code Owners, other reviewers can be added.
+#  - There can be different code owners for different branches.
+#  - PRs will require the approval of at least one code owner.
+#
+# For more details, you can refer to 
+# https://github.blog/2017-07-06-introducing-code-owners/
+#
+# The format of CODEOWNERS is: <pattern> + <mail address of one/more owners>
+# In case of multiple matches, the last pattern matched will take precedence.
+
+##### Global code owners (for folders with no later match) #####
+*    [email protected] [email protected] [email protected]
+
+##### Code owners for CI related files/folders #####
+/CI/	[email protected] [email protected] [email protected] [email protected] [email protected]
+azure-pipelines.yml	[email protected] [email protected] [email protected] [email protected] [email protected]

.github/PULL_REQUEST_TEMPLATE.md

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+## PR Description
+
+- Please replace this comment with a summary of your changes, and add any context 
+necessary to understand them. List any dependencies required for this change.
+- To check the checkboxes below, insert a 'x' between square brackets (without 
+any space), or simply check them after publishing the PR.
+- If you changes include a breaking change, please specify dependent PRs in the 
+description and try to push all related PRs simultaneously.
+
+## PR Type
+- [ ] Bug fix (a change that fixes an issue)
+- [ ] New feature (a change that adds new functionality)
+- [ ] Breaking change (a change that affects other repos or cause CIs to fail)
+
+## PR Checklist
+- [ ] I have followed the coding standards and guidelines
+- [ ] I have conducted a self-review of my own code changes
+- [ ] I have commented new code, particulary complex or unclear areas 
+- [ ] I have built libad9361-iio and check no new warnings/errors were introduced
+- [ ] I have checked that my changes did not broke components that use libad9361-iio as dependency
+- [ ] I have updated the documentation accordingly (GitHub Pages, READMEs, etc)