For regular trim patterns and materials, it is no longer necessary to create basic models and an item model override entry for vanilla armors. These are generated at runtime, but may be overridden by resource-packs. Same is true for any mods which implement the "any_trim" item model override provider (which you should to maintain compat).
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }