Add TDLib packaging and release scripts

README.md

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+# shinoa-tdlib
+
+Prebuilt TDLib bundles used by `shinoa`.
+
+## Bundle Format
+
+Release assets are expected to contain a top-level `tdlib/` directory with:
+
+- `tdlib/include/`
+- `tdlib/lib/`
+
+At minimum, the app build expects:
+
+- `tdlib/include/td/telegram/td_json_client.h`
+- `tdlib/include/td/telegram/tdjson_export.h`
+- `tdlib/lib/libtdjson.so`
+- `tdlib/lib/libtdjson.so.<soname>`
+
+## Build Locally
+
+Build and install TDLib somewhere on your local machine:
+
+```bash
+cmake -S /path/to/tdlib -B td-build \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_INSTALL_PREFIX="$PWD/td-install"
+cmake --build td-build -j"$(nproc)"
+cmake --install td-build
+```
+
+Package it into the expected archive format:
+
+```bash
+./scripts/package-tdlib.sh td-install tdlib-linux-x86_64.tar.gz
+```
+
+## Publish Release
+
+Publish the archive and checksum to a versioned release tag derived from the TDLib soname,
+for example `v1.8.63`:
+
+```bash
+./scripts/publish-release.sh tdlib-linux-x86_64.tar.gz
+```
+
+By default the script derives the tag from the archive contents. You can override it:
+
+```bash
+RELEASE_TAG=v1.8.63 ./scripts/publish-release.sh tdlib-linux-x86_64.tar.gz
+```