Make linear_fitting function generic #708

	name: Test & Coverage
	on: [pull_request]
	jobs:
	test_and_coverage:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Install Libraries
	run: \|
	sudo apt-get update -y && \
	sudo apt-get install -y --no-install-recommends \
	liblapacke-dev \
	libopenblas-dev \
	libsuitesparse-dev
	- name: Compile MUMPS
	run: \|
	bash zscripts/compile-and-install-mumps.bash
	- name: Install Rust
	run: \|
	rustup toolchain install nightly --component llvm-tools-preview
	rustup default nightly
	- name: Run tests
	run: \|
	RUST_BACKTRACE=1 cargo test --features with_mumps
	- name: Install cargo-llvm-cov
	run: \|
	curl -LsSf https://github.com/taiki-e/cargo-llvm-cov/releases/latest/download/cargo-llvm-cov-x86_64-unknown-linux-gnu.tar.gz \| tar xzf - -C ~/.cargo/bin
	- name: Generate code coverage
	run: \|
	cargo llvm-cov --workspace --features with_mumps --ignore-filename-regex 'build.rs\|mem_check.rs\|mem_check_lab.rs\|solve_matrix_market.rs\|amplifier1t.rs\|brusselator_pde.rs' --lcov --output-path lcov.info
	- name: Upload to codecov.io
	uses: codecov/codecov-action@v4
	with:
	token: ${{secrets.CODECOV_TOKEN}}
	files: lcov.info
	fail_ci_if_error: true

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