Update Maven coordinates to match project structure [skip ci]

Changed Maven groupId and project metadata:
- groupId: org.openapitools → com.rootly.client
- version: v1 → 0.0.1 (matching build.gradle)
- name: rootly → rootly-java
- URL: Updated to rootlyhq/rootly-java repository
- License: Unlicense → MIT License
- Organization: OpenAPITools.org → Rootly
- SCM: Updated to correct repository URLs

Protected pom.xml from regeneration in .openapi-generator-ignore.

Maven dependency usage is now:
<dependency>
  <groupId>com.rootly.client</groupId>
  <artifactId>rootly</artifactId>
  <version>0.0.1</version>
</dependency>

Author: kwent

.openapi-generator-ignore

@@ -24,6 +24,7 @@
 
 # Protect custom files from regeneration
 build.gradle
+pom.xml
 LICENSE
 README.md
 CLAUDE.md

pom.xml

@@ -1,33 +1,33 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>org.openapitools</groupId>
+    <groupId>com.rootly.client</groupId>
     <artifactId>rootly</artifactId>
     <packaging>jar</packaging>
-    <name>rootly</name>
-    <version>v1</version>
-    <url>https://github.com/openapitools/openapi-generator</url>
-    <description>OpenAPI Java</description>
+    <name>rootly-java</name>
+    <version>0.0.1</version>
+    <url>https://github.com/rootlyhq/rootly-java</url>
+    <description>Java client library for Rootly incident management platform</description>
     <scm>
-        <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
-        <developerConnection>scm:git:git@github.com:openapitools/openapi-generator.git</developerConnection>
-        <url>https://github.com/openapitools/openapi-generator</url>
+        <connection>scm:git:git@github.com:rootlyhq/rootly-java.git</connection>
+        <developerConnection>scm:git:git@github.com:rootlyhq/rootly-java.git</developerConnection>
+        <url>https://github.com/rootlyhq/rootly-java</url>
     </scm>
 
     <licenses>
         <license>
-            <name>Unlicense</name>
-            <url>http://unlicense.org</url>
+            <name>MIT License</name>
+            <url>https://opensource.org/licenses/MIT</url>
             <distribution>repo</distribution>
         </license>
     </licenses>
 
     <developers>
         <developer>
-            <name>OpenAPI-Generator Contributors</name>
-            <email>team@openapitools.org</email>
-            <organization>OpenAPITools.org</organization>
-            <organizationUrl>http://openapitools.org</organizationUrl>
+            <name>Rootly</name>
+            <email>support@rootly.com</email>
+            <organization>Rootly</organization>
+            <organizationUrl>https://rootly.com</organizationUrl>
         </developer>
     </developers>