Add projectile trajectory calculation for player launching

[Copilot]

No force calculation existed for creating parabolic trajectories to land players at target locations.

Changes

• New utility class: TrajectoryCalculator in org.rendang.plugin.core.util

  • calculateForce(Player, Block) - computes velocity vector using projectile motion equations
  • calculateForce(Location, Location) - overload for custom locations
  • calculateForceWithTime(...) - time-based variant for predictable flight duration

• Physics implementation

  • Trajectory equation: y = x·tan(θ) - (g·x²)/(2·v²·cos²(θ))
  • Minecraft gravity: 0.08 blocks/tick²
  • Auto-selects launch angle based on target elevation
  • Target location: block center (0.5, 0.5) + 1 block above surface

• Example command: /example launch demonstrates usage by launching player to targeted block

Usage

Block targetBlock = player.getTargetBlockExact(100);
Vector velocity = TrajectoryCalculator.calculateForce(player, targetBlock);
player.setVelocity(velocity);

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• repo.papermc.io
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/RendangPlugin/RendangPlugin org.codehaus.plexus.classworlds.launcher.Launcher clean compile -DskipTests (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/RendangPlugin/RendangPlugin org.codehaus.plexus.classworlds.launcher.Launcher -f pom.xml -B -V -e -Dfindbugs.skip -Dcheckstyle.skip -Dpmd.skip=true -Dspotbugs.skip -Denforcer.skip -Dmaven.javadoc.skip (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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