Use libtorch-releases for all Linux builds, add ARM64 CUDA (Jetson)

Fix CUDA libtorch version: cu124 does not exist for 2.7.0, use cu126

Add CUDA release build, tokenizer generation, and install script

Remove all CI caching and always build with latest upstream deps

Merge pull request #9 from second-state/add-linux-arm64-release

Add Linux aarch64 build-from-source section

Remove LD_LIBRARY_PATH from x86_64 quick start

Remove LD_LIBRARY_PATH from aarch64 quick start

Add Linux aarch64 release build

Update project link from Clawdbot to OpenClaw

Add .env file support via dotenvy

Add LIBRARY_PATH for macOS linker to find lame/opus

Use apt/brew packages for lame/opus, bundle shared libs in release

Add CFLAGS/LDFLAGS for macOS lame discovery

Install lame/opus to native system paths for pkg-config discovery