Add Unicode escape sequence support (\uXXXX)

[Copilot]

Adds support for Unicode escape sequences in text processing, enabling characters like \uE001 in scoreboard, tablist, and chat configs. Essential for Minecraft resource packs that use private use area Unicode characters for custom icons.

• Added translateUnicodeEscapes() to Placeholders.java — regex-based conversion of \uXXXX patterns to actual Unicode characters, following the same approach as translateHexColor()
• Integrated into the replace() pipeline, executed before color code translation

# Example usage in config
lines:
  - "&6Custom icon: \uE001"
  - "Heart: \u2764"

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:

• hub.spigotmc.org
  • 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/PowerBoard/PowerBoard org.codehaus.plexus.classworlds.launcher.Launcher compile (dns block)
• jitpack.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/PowerBoard/PowerBoard org.codehaus.plexus.classworlds.launcher.Launcher compile (dns block)
• repo.extendedclip.com
  • 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/PowerBoard/PowerBoard org.codehaus.plexus.classworlds.launcher.Launcher compile (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)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add Unicode Escaping</issue_title>
<issue_description>Add Unicode Escaping
For example, you can escape a character using \uE001.

Originally posted by @Mikayato2177 in #66</issue_description>

Comments on the Issue (you are @copilot in this section)

@Xitee1 @copilot Please create a PR to add support for unicode escaping

• Fixes Add Unicode Escaping #67

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.