Update issue templates

.github/ISSUE_TEMPLATE/general-theme-request.md

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+---
+name: General Theme Request
+about: Request a new general theme, or report an existing theme that is missing cards,
+  misconfigured, or poorly described.
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+### Theme Name
+_What is the name of the theme? (e.g., "Graveyard Recursion", "Artifact Synergy")_
+
+### Request Type
+- [ ] New theme — this theme doesn't exist in the catalog yet
+- [ ] Existing theme fix — a theme exists but is missing cards or has incorrect data
+- [ ] Theme description improvement — the description is generic/unhelpful
+
+### Theme Description
+_In your own words, describe what this theme is about. What does a deck built around it try to do?_
+
+### Example Cards
+_List 3–10 cards that clearly represent this theme. Include the card name and a brief note on why it fits._
+
+```
+- Card Name — reason it fits
+- Card Name — reason it fits
+- Card Name — reason it fits
+```
+
+### Colors
+_What color(s) is this theme primarily associated with? (W/U/B/R/G/Colorless — or "All")_
+
+### Related Themes
+_Are there existing themes in the catalog this is closely related to or overlaps with?_
+
+### Additional Notes
+_Anything else we should know? Links to relevant resources (EDHREC, MTG Wiki, etc.) are welcome._