[MDEP-728] Maven v4 / Plugin v4 Tidy Up parameters and messages

**[John Patrick](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=nhoj.patrick)** opened **[MDEP-728](https://issues.apache.org/jira/browse/MDEP-728?redirect=false)** and commented

The error message reads;

```
[ERROR] Failed to execute goal on project artifact-id: Could not resolve dependencies for project group-id:artifact-id:jar:VERSION: Cannot access central (https://repo.maven.apache.org/maven2) in offline mode and the artifact org.joda:joda-beans:jar:2.8.1 has not been downloaded from it before. -> [Help 1]
```

But you can't simply copy and paste that into get like this;

```bash
mvnw -N org.apache.maven.plugins:maven-dependency-plugin:3.1.2:get -Dartifact=org.joda:joda-beans:jar:2.8.1
```

It needs to be this;

```bash
mvnw -N org.apache.maven.plugins:maven-dependency-plugin:3.1.2:get -Dartifact=org.joda:joda-beans:2.8.1
```

The documentation for get requires this syntax;

```
groupId:artifactId:version[:packaging[:classifier]].
```

For Maven v4.x and/or maven-dependency-plugin v4.x could the error message match the input format, or the input format match the error message for easier copy/paste usage.

Personally I would prefer the error message to match the get artifact syntax as it makes more sense for me to be groupId:artifactId:version:packaging.

---

**Affects:** 3.1.2

The issue identifies the dependency-resolution error and the maven-dependency-plugin get goal, but no source file or test. Start by locating the code that formats the offline error and the get goal's artifact-coordinate parsing, then compare their formats. Done means the displayed coordinates follow the documented get syntax and relevant tests pass.

Written by the indexing model from the issue text.