Update build scripts for Gradle 7 (#247)

* fabric: Update Loom to 0.7-SNAPSHOT

* Update to Gradle 7

Switch to CadixDev/licenser
The plugin we were using before does not support Gradle 7, and hasn't been updated in over a year.

* Remove `jcenter()` references

* Move to new JDA repo and bump version

* Use setup-java v2 and Adopt JDK 16 in gh actions

* build: Temporarily add Incendo repo for plugin resolution

Allows building until licenser has a new release

* Import indra plugin classes instead of string applies

* remove space

Co-authored-by: broccolai <me@broccol.ai>

cloud-services/src/main/java/cloud/commandframework/services/annotations/package-info.java

@@ -21,7 +21,6 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 //
-
 /**
  * Service related annotations
  */

cloud-services/src/main/java/cloud/commandframework/services/package-info.java

@@ -21,7 +21,6 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 //
-
 /**
  * IntellectualSites service pipeline system
  */

cloud-services/src/main/java/cloud/commandframework/services/types/package-info.java

@@ -21,7 +21,6 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 //
-
 /**
  * Service implementation types
  */