Add postgresml extension (#200)

Co-authored-by: Evan Stanton <evan.h.stanton@gmail.com>

contrib/postgresml/Dockerfile

@@ -0,0 +1,43 @@
+ARG PG_VERSION=15
+FROM quay.io/coredb/pgrx-builder:pg${PG_VERSION}-pgrx0.9.7
+USER root
+# quay.io/coredb/pgrx-builder:pg15-pgrx0.9.7
+# Extension build dependencies
+RUN apt-get update && apt-get install -y \
+	build-essential \
+	libreadline-dev \
+	zlib1g-dev \
+	flex \
+	bison \
+	libxml2-dev \
+	libxslt-dev \
+	libssl-dev \
+	libxml2-utils \
+	xsltproc \
+	ccache \
+	python3-dev \
+	clang \
+	cmake \
+	libclang-dev \
+	libopenblas-dev \
+	libpython3-dev \
+	pkg-config
+
+# Install Rust
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+# Set default Rust version
+RUN /root/.cargo/bin/rustup default stable
+
+# Clone repository
+RUN git clone https://github.com/postgresml/postgresml.git
+
+ARG RELEASE=v2.7.1
+
+RUN cd postgresml && \
+	git submodule update --init --recursive && \
+	git fetch origin ${RELEASE} && \
+	git checkout ${RELEASE} && \
+	cd pgml-extension && \
+    cargo pgrx init --pg15 /usr/bin/pg_config && \
+    cargo pgrx package

contrib/postgresml/Trunk.toml

@@ -0,0 +1,19 @@
+[extension]
+name = "pgml"
+version = "2.7.1"
+repository = "https://github.com/postgresml/postgresml"
+license = "MIT"
+description = "PostgresML is a machine learning extension to PostgreSQL that enables you to perform training and inference on text and tabular data using SQL queries."
+homepage = "https://postgresml.org/"
+documentation = "https://postgresml.org/docs/guides/setup/quick_start_with_docker"
+categories = ["machine_learning"]
+
+[build]
+postgres_version = "15"
+platform = "linux/amd64"
+dockerfile = "Dockerfile"
+install_command = """
+    cd postgresml/pgml-extension
+    mv target/release/pgml-pg15/usr/lib/postgresql/15/lib/* /usr/lib/postgresql/15/lib
+    mv target/release/pgml-pg15/usr/share/postgresql/15/extension/* /usr/share/postgresql/15/extension
+"""