chore: simplify issue templates, align with upstream (#611)

Author: yury-s

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: Bug Report
+about: Something doesn't work like it should? Tell us!
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Context:**
+- Playwright Version: [what Playwright version do you use?]
+- Operating System: [e.g. Windows, Linux or Mac]
+- Browser: [e.g. All, Chromium, Firefox, WebKit]
+- Extra: [any specific details about your environment]
+
+<!-- CLI to auto-capture this info -->
+<!-- npx envinfo --preset playwright --markdown -->
+
+**Code Snippet**
+
+Help us help you! Put down a short code snippet that illustrates your bug and
+that we can run and debug locally. For example:
+
+```java
+import com.microsoft.playwright.*;
+
+public class ExampleReproducible {
+  public static void main(String[] args) {
+    try (Playwright playwright = Playwright.create()) {
+      Browser browser = playwright.chromium().launch();
+      BrowserContext context = browser.newContext();
+      Page page = context.newPage();
+      // ...
+    }
+  }
+}
+```
+
+**Describe the bug**
+
+Add any other details about the problem here.

.github/ISSUE_TEMPLATE/bug.yml

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+---
+name: Feature request
+about: Request new features to be added
+title: "[Feature]"
+labels: ''
+assignees: ''
+
+---
+
+Let us know what functionality you'd like to see in Playwright and what your use case is.
+Do you think others might benefit from this as well?

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: I have a question
+about: Feel free to ask us your questions!
+title: "[Question]"
+labels: ''
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/feature_request.yml

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+---
+name: Report regression
+about: Functionality that used to work and does not any more
+title: "[REGRESSION]: "
+labels: ''
+assignees: ''
+
+---
+
+**Context:**
+- GOOD Playwright Version: [what Playwright version worked nicely?]
+- BAD Playwright Version: [what Playwright version doesn't work any more?]
+- Operating System: [e.g. Windows, Linux or Mac]
+- Extra: [any specific details about your environment]
+
+**Code Snippet**
+
+Help us help you! Put down a short code snippet that illustrates your bug and
+that we can run and debug locally. For example:
+
+```java
+import com.microsoft.playwright.*;
+
+public class ExampleReproducible {
+  public static void main(String[] args) {
+    try (Playwright playwright = Playwright.create()) {
+      Browser browser = playwright.chromium().launch();
+      BrowserContext context = browser.newContext();
+      Page page = context.newPage();
+      // ...
+    }
+  }
+}
+```
+
+**Describe the bug**
+
+Add any other details about the problem here.