* supports the following key features:
 *
 * <ul>
 *   <li>Maintains parent-child relationships between requests to track operation nesting</li>
 *   <li>Carries contextual data describing the current request or operation</li>
 *   <li>Supports both internal session operations and client-provided trace information</li>
 * </ul>
 *

 * Key components include:
 * <ul>
 *   <li>{@link org.apache.maven.api.model.Model} - The root element of a POM file</li>
 *   <li>{@link org.apache.maven.api.model.Dependency} - Represents a project dependency</li>
 *   <li>{@link org.apache.maven.api.model.Plugin} - Represents a Maven plugin configuration</li>
 *   <li>{@link org.apache.maven.api.model.Build} - Contains build configuration information</li>

 * <ul>
 *   <li>User and system properties for interpolation</li>
 *   <li>Session start time information</li>
 *   <li>Project directory structures</li>
 * </ul>
 *
 * <p>Requests can optionally carry trace information through {@link RequestTrace} to support:
 * <ul>
 *   <li>Debugging and troubleshooting of request flows</li>
 *   <li>Audit logging of operations</li>

     * <ul>
     *   <li>For included dependencies: {@code groupId:artifactId:version[:scope] (details)}</li>
     *   <li>For omitted dependencies: {@code (groupId:artifactId:version[:scope] - details)}</li>
     * </ul>
     * Where details may include:
     * <ul>
     *   <li>Version management information (if the version was managed from a different version)</li>

 * <ul>
 *   <li>{@code merge} (default): Merges attributes and values</li>
 *   <li>{@code override}: Completely replaces the element</li>
 *   <li>{@code remove}: Removes the element</li>
 * </ul>
 *
 * <p>For complex XML structures, combining can also be done based on:</p>
 * <ul>
 *   <li>ID: Using the {@code combine.id} attribute</li>

 *     <li><code>alpha</code> or <code>a</code></li>
 *     <li><code>beta</code> or <code>b</code></li>
 *     <li><code>milestone</code> or <code>m</code></li>
 *     <li><code>rc</code> or <code>cr</code></li>
 *     <li><code>snapshot</code></li>
 *     <li><code>ga</code> or <code>final</code></li>
 *     <li><code>sp</code></li>
 *     </ol>

 * managing build environments.</p>
 *
 * <p>Key features include:</p>
 * <ul>
 *   <li>Interactive command-line interface</li>
 *   <li>Command history and completion</li>
 *   <li>Built-in shell commands</li>
 *   <li>Project navigation and management</li>
 * </ul>
 *
 * @see org.apache.maven.api.cli.Tools#MVNSHELL_CMD
 * @see org.apache.maven.api.cli.Tools#MVNSHELL_NAME
 * @since 4.0.0

 *
 * Hierarchy:
 * <ul>
 * <li>{@link org.apache.maven.cling.invoker.LookupInvoker} is the "basis", the common ground of all Maven Tools</li>
 * <li>extended by {@link org.apache.maven.cling.invoker.mvn.MavenInvoker} is the "mvn Tool"</li>
 * <li>extended by {@link org.apache.maven.cling.invoker.mvnenc.EncryptInvoker} is the "mvnenc Tool"</li>

   *
   * <p>When escaping a String, the following rules apply:
   *
   * <ul>
   *   <li>The alphanumeric characters "a" through "z", "A" through "Z" and "0" through "9" remain
   *       the same.
   *   <li>The special characters ".", "-", "*", and "_" remain the same.
   *   <li>The space character " " is converted into a plus sign "+".
   *   <li>All other characters are converted into one or more bytes using UTF-8 encoding and each

 * <li>POM: Repositories can be specified in the {@code pom.xml} file under the {@code <repositories>} and {@code <pluginRepositories>} sections.</li>
 * <li>Settings: the {@code settings.xml} can be used to provide additional repositories in the three level of settings (user, project, installation).</li>
 * </ol>