feat: optimize builder Dockerfile with pre-built release binaries

Download neverwinter.nim tools, nasher, and layonara_nwn from GitHub
Releases instead of compiling from source. Reduces build time from
~15 minutes to ~45 seconds.

builder/Dockerfile

@@ -7,28 +7,25 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     cmake \
     git \
     curl \
-    wget \
-    unzip \
     ca-certificates \
     libssl-dev \
+    libsqlite3-0 \
     pkg-config \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Nim via choosenim
-RUN curl https://nim-lang.org/choosenim/init.sh -sSf | bash -s -- -y
-ENV PATH="/root/.nimble/bin:${PATH}"
-RUN choosenim 2.2.0
+# Pre-built neverwinter.nim tools (nwn_gff, nwn_script_comp, etc.)
+RUN curl -L https://github.com/layonara/neverwinter.nim/releases/download/v2.1.2-layonara/neverwinter-tools-linux-x64.tar.gz \
+    | tar xz -C /usr/local/bin/
 
-# Install neverwinter.nim tools (nwn_gff, nwn_script_comp, etc.)
-RUN nimble install neverwinter@2.1.2 -y
+# Pre-built nasher (NWN module build tool)
+RUN curl -L https://github.com/squattingmonk/nasher.nim/releases/download/1.1.2/nasher_linux.tar.gz \
+    | tar xz -C /usr/local/bin/
 
-# Install nasher
-RUN nimble install nasher -y
+# Pre-built layonara_nwn (hak builder)
+RUN curl -L https://github.com/plenarius/layonara_nwn/releases/download/v0.1.1/layonara_nwn-linux-x64.tar.gz \
+    | tar xz -C /usr/local/bin/
 
-# Install layonara_nwn (hak builder)
-RUN nimble install https://github.com/plenarius/layonara_nwn -y
-
-# Verify tools
-RUN nwn_gff --version && nasher --version && which nwn_script_comp
+# Verify all tools
+RUN nwn_gff --version && nasher --version && which nwn_script_comp && layonara_nwn --help | head -1
 
 WORKDIR /build