Refactor plugin.yml and pom.xml to use Maven variables

The plugin.yml and pom.xml files were refactored to utilize Maven variables for elements including project name, version, description, and URL. This simplifies the process of updating these values, as they now only need to be modified in one location. This change enhances maintainability and code readability.

src/main/resources/plugin.yml

@@ -1,4 +1,4 @@
-name: YardWatch
+name: '${project.artifactId}'
 version: '${project.version}'
 main: me.youhavetrouble.yardwatch.YardWatch
 api-version: '1.13'
@@ -8,5 +8,5 @@ softdepend:
   - "Towny"
 authors:
   - "YouHaveTrouble"
-description: "Implementation of YardWatchAPI for common protection plugins"
-website: "https://youhavetrouble.me"
+description: '${project.description}'
+website: '${project.url}'