chore: issue & pr templates (#104)

* Add PR template

* Add issue templates

* Add maintainer blank issue

* Update bug_report.yml

* Add code owners

* Update codeowner

* Update feature.yml

Author: buenaflor

.github/CODEOWNERS

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+*       @marandaneto @romtsn @buenaflor

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: 🐞 Bug Report
+description: Tell us about something that's not working the way we (probably) intend.
+labels: ["Platform: KMP", "Type: Bug"]
+body:
+  - type: dropdown
+    id: environment
+    attributes:
+      label: Platform
+      description: Which platform do you use?
+      multiple: true
+      options:
+        - Apple
+        - Android
+        - JVM
+    validations:
+      required: true
+
+  - type: dropdown
+    id: installed
+    attributes:
+      label: Installed
+      description: sentry-cocoa installed with (if applicable)
+      options:
+        - Swift Package Manager
+        - CocoaPods
+
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: Which version of sentry-kotlin-multiplatform do you use?
+      placeholder: 0.2.0 ← should look like this
+    validations:
+      required: true
+
+  - type: textarea
+    id: repro
+    attributes:
+      label: Steps to Reproduce
+      description: How can we see what you're seeing? Specific is terrific.
+      placeholder: |-
+        1. foo
+        2. bar
+        3. baz
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Result
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual Result
+      description: Logs? Screenshots? Yes, please.
+    validations:
+      required: true
+
+  - type: markdown
+    attributes:
+      value: |-
+        ## Thanks 🙏
+        Check our [triage docs](https://open.sentry.io/triage/) for what to expect next.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Join Sentry Discord
+    url: https://discord.com/invite/sentry
+    about: A place to talk about SDK development and other Sentry related topics. It's not meant as a support channel.

.github/ISSUE_TEMPLATE/feature.yml

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+name: 💡 Feature Request
+description: Tell us about a problem our SDK could solve but doesn't.
+labels: ["Platform: KMP", "Type: Feature Request"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem Statement
+      description: What problem could Sentry solve that it doesn't?
+      placeholder: |-
+        I want to make whirled peas, but Sentry doesn't blend.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Solution Brainstorm
+      description: We know you have bright ideas to share ... share away, friend.
+      placeholder: |-
+        Add a blender to Sentry.
+    validations:
+      required: false
+
+  - type: markdown
+    attributes:
+      value: |-
+        ## Thanks 🙏
+        Check our [triage docs](https://open.sentry.io/triage/) for what to expect next.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/maintainer-blank.yml

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+name: Blank Issue
+description: Blank Issue. Reserved for maintainers.
+labels: ["Platform: KMP"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Please describe the issue.
+    validations:
+      required: true
+
+  - type: markdown
+    attributes:
+      value: |-
+        ## Thanks 🙏
+        Check our [triage docs](https://open.sentry.io/triage/) for what to expect next.

.github/pull_request_template.md

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+## :scroll: Description
+
+<!--- Describe your changes in detail -->
+
+## :bulb: Motivation and Context
+
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## :green_heart: How did you test it?
+
+## :pencil: Checklist
+
+You have to check all boxes before merging:
+
+- [ ] I reviewed the submitted code.
+- [ ] I added tests to verify the changes.
+- [ ] No new PII added or SDK only sends newly added PII if `sendDefaultPII` is enabled.
+- [ ] I updated the docs if needed.
+- [ ] Review from the native team if needed.
+- [ ] No breaking change or entry added to the changelog.
+
+## :crystal_ball: Next steps