Add new language issue template (#360)

Provides a template for requesting a new language, that prompts the user to provide useful details and check if tokei supports the language.

Co-authored-by: o2sh <[email protected]>

Author: spenserblack

.github/ISSUE_TEMPLATE/new-language.md

@@ -0,0 +1,22 @@
+---
+name: New language
+about: Request for a new language to be supported
+title: "Support for [NEW LANGUAGE]"
+labels: 'Type: Enhancement, good first issue'
+assignees: ''
+
+---
+
+# \[Language Name\]
+<!-- Please provide the name of the language and any additional details that we should know -->
+
+## Logo
+
+<!-- Is there a logo that can be used as a source of inspiration for the ASCII art? -->
+
+## Upstream support
+
+<!-- Onefetch relies on tokei for language detection. Does tokei already support the language in question? -->
+- [ ] [tokei] supports this language
+
+[tokei]: https://github.com/XAMPPRocky/tokei