ci: add GitHub Actions workflows; drop obsolete build scripts #1

	name: ci

	on:
	push:
	branches: [main, memory-refactor]
	pull_request:

	env:
	CARGO_TERM_COLOR: always
	RUSTFLAGS: "-D warnings"

	jobs:
	test:
	name: build + test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: dtolnay/rust-toolchain@stable
	with:
	components: clippy, rustfmt

	- uses: Swatinem/rust-cache@v2
	with:
	# The LanceDB dep tree is big; cache shared across matrix jobs.
	shared-key: ling-mem

	- name: cargo fmt
	run: cargo fmt --all -- --check

	- name: cargo clippy
	# Warnings-as-errors is handled by RUSTFLAGS above; also deny clippy.
	run: cargo clippy --all-targets -- -D warnings

	- name: cargo build
	run: cargo build --locked

	- name: cargo test
	run: cargo test --lib --locked

Provide feedback