add github issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,36 @@
+name: Bug Report
+labels: ''
+description: Report a problem with vis.
+body:
+
+  - type: markdown
+    attributes:
+      value: |
+        ***Before reporting***, search [existing issues.](https://github.com/martanne/vis/issues?q=type%3Aissue)
+
+  - type: textarea
+    attributes:
+      label: "Problem"
+      description: "Describe the current behavior."
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: "Steps to reproduce"
+      placeholder: |
+        :,
+        :y/regex/
+  - type: input
+    attributes:
+      label: "vis version (vis -v)"
+      placeholder: "vis v0.7-151-g8ff0bea-dirty +curses +lua +tre +acl"
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: "Terminal name/version"
+      placeholder: "st 0.8.2"
+  - type: input
+    attributes:
+      label: "$TERM environment variable"
+      placeholder: "st-256color"

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: IRC Channel
+    url: https://web.libera.chat/#vis-editor
+    about: "Join the IRC channel #vis-editor on libera."
+  - name: Mailing List
+    url: https://lists.sr.ht/~martanne/devel
+    about: The vis Mailing List.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,13 @@
+name: Feature Request
+description: Thank you for your interest in improving vis.
+title: "[Feature Request]:"
+labels: [meta:feature-request]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### The current practice and preferred location for large feature requests and general design discussion is the vis [mailing list](https://lists.sr.ht/~martanne/devel).
+
+  - type: textarea
+    attributes:
+      label: What feature would you like to see?