feat(application): add Railpack as a new build type

- Introduce Railpack as a new build method for applications
- Update database schema to include 'railpack' in buildType enum
- Add Railpack installation and validation scripts for servers
- Implement Railpack build and command generation utilities
- Update UI to include Railpack as a build option with a 'New' badge

Dockerfile

@@ -55,6 +55,10 @@ RUN curl -sSL https://nixpacks.com/install.sh -o install.sh \
     && ./install.sh \
     && pnpm install -g tsx
 
+# Install Railpack
+ARG RAILPACK_VERSION=0.0.37
+RUN curl -sSL https://railpack.com/install.sh | sh
+
 # Install buildpacks
 COPY --from=buildpacksio/pack:0.35.0 /usr/local/bin/pack /usr/local/bin/pack