Add issue templates for bug reports and feature requests

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report an issue with RuboCop RSpec you've discovered.
+---
+
+*Be clear, concise and precise in your description of the problem.
+Open an issue with a descriptive title and a summary in grammatically correct,
+complete sentences.*
+
+*Use the template below when reporting bugs. Please, make sure that
+you're running the latest stable RuboCop RSpec and that the problem you're reporting
+hasn't been reported (and potentially fixed) already.*
+
+*Before filing the ticket you should replace all text above the horizontal
+rule with your own words.*
+
+*In the case of false positive or false negative, please add the
+corresponding cop name.*
+
+______________________________________________________________________
+
+## Expected behavior
+
+Describe here how you expected RuboCop RSpec to behave in this particular situation.
+
+## Actual behavior
+
+Describe here what actually happened.
+Please use `rubocop --debug` when pasting rubocop output as it contains additional information.
+
+## Steps to reproduce the problem
+
+This is extremely important! Providing us with a reliable way to reproduce
+a problem will expedite its solution.
+
+## RuboCop RSpec version
+
+Include the output of `rubocop -V` or `bundle exec rubocop -V` if using Bundler.
+If you see extension cop versions (e.g. `rubocop-performance`, `rubocop-rake`, and others)
+output by `rubocop -V`, include them as well. Here's an example:
+
+```shell
+$ [bundle exec] rubocop -V
+1.67.0 (using Parser 3.3.5.0, rubocop-ast 1.32.3, analyzing as Ruby 2.7, running on ruby 3.4.0) [arm64-darwin23]
+  - rubocop-performance 1.22.1
+  - rubocop-rake 0.6.0
+  - rubocop-rspec 3.1.0
+```

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest new RuboCop RSpec features or improvements to existing features.
+---
+
+## 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.