Update issue templates

.github/ISSUE_TEMPLATE/format-request.md

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+---
+name: Format request
+about: Request a new archive format.
+title: 'Format support: <NAME>'
+labels: format request
+assignees: Le0X8
+
+---
+
+**What is the name of the format to support?**
+
+<!-- e.g. ZIP, HSSP, RAR, ... -->
+
+**Can you give some information about this format?**
+
+<!-- You can use Wikipedia for that, but we have to ensure that we don't have a ton of formats with the same name which all have different structure and functionality. -->
+
+**How big is the group of people who use this format?**
+
+- [ ] 1-1k
+- [ ] 1k-100k
+- [ ] 100k+
+
+**Can you provide any documentation on this format?**
+
+<!-- If no, you can leave this field empty, but it can be a pain in the ass to research the file structure, so please give some information if you can provide them. -->
+
+**Why should we support this format?**
+
+<!-- If there's no reason for implementation, why should we even support it? -->