chore: add AGENTS.md (#201)

https://coveord.atlassian.net/browse/KIT-5913

Author: Copilot

AGENTS.md

@@ -0,0 +1,39 @@
+# AGENTS.md
+
+## Prerequisites
+
+Install the following before running any project task:
+
+- Java 11 or higher
+- Apache Maven 3.6+
+- (If installing from GitHub Packages) a GitHub personal access token with `read:packages` scope configured in `~/.m2/settings.xml`
+
+## Build
+
+Required installs: see [Prerequisites](#prerequisites).
+
+Build command:
+
+```bash
+mvn -B package --file pom.xml
+```
+
+## Test
+
+Required installs: see [Prerequisites](#prerequisites).
+
+Test command:
+
+```bash
+mvn test
+```
+
+## Lint
+
+Required installs: see [Prerequisites](#prerequisites).
+
+Lint/format check command:
+
+```bash
+mvn spotless:check
+```