feat: enhance decompilation and server management scripts

- Introduced `decompile.sh` to automate the decompilation process, including downloading `MinecraftDecompiler.jar` and server.jar for specified Minecraft versions.
- Added `mc-rcon.sh` for sending RCON commands to a Minecraft server, improving server management capabilities.
- Created `mcc-env.sh` to provide helper functions for managing Minecraft servers, including starting, stopping, and sending commands.
- Implemented `start-server.sh` to launch a Minecraft server in a tmux session with a named pipe for stdin, facilitating easier command input.
- Updated `README.md` to reflect new tools and usage instructions for decompiling and server management.

These changes streamline the workflow for adapting to new Minecraft versions and enhance the overall development experience.

tools/start-server.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+# Start a Minecraft server in a tmux session with named pipe for stdin
+# Servers live in MinecraftOfficial/downloads/<version>/ alongside the downloaded server.jar
+VERSION="${1}"
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+DOWNLOADS="$REPO_ROOT/MinecraftOfficial/downloads"
+DIR="$DOWNLOADS/$VERSION"
+PIPE="$DIR/stdin.pipe"
+SESSION="mc-${VERSION//\./_}"
+
+if [ -z "$VERSION" ] || [ ! -d "$DIR" ]; then
+    echo "Error: Server directory not found${VERSION:+: $DIR}"
+    echo "Available versions:"
+    ls "$DOWNLOADS" | grep -E '^[0-9]' | sort -V
+    exit 1
+fi
+
+if [ ! -f "$DIR/server.jar" ]; then
+    echo "Error: No server.jar in $DIR"
+    exit 1
+fi
+
+if tmux has-session -t "$SESSION" 2>/dev/null; then
+    echo "Server $VERSION already running in tmux session '$SESSION'"
+    echo "View output:  tmux capture-pane -t '$SESSION' -p -S -50"
+    echo "Send command: echo 'say hello' > $PIPE"
+    exit 0
+fi
+
+rm -f "$DIR/world/session.lock"
+
+[ -p "$PIPE" ] || mkfifo "$PIPE"
+
+tmux new-session -d -s "$SESSION" -c "$DIR" \
+  "tail -f $PIPE | java -Xmx2G -Xms2G -jar server.jar nogui 2>&1"
+
+echo "Server $VERSION started in tmux session '$SESSION'"
+echo "Send commands: echo 'say hello' > $PIPE"
+echo "View output:   tmux capture-pane -t '$SESSION' -p -S -50"