add readme for sparc-x conda-forge

Author: alchem0x2A

.conda/README.md

@@ -1,4 +1,9 @@
 # Build conda recipe for sparc
+
+**Note** the official conda-forge package for SPARC can be found at
+[`sparc-x`](https://github.com/conda-forge/sparc-x-feedstock). This
+recipe is maintained for CI purpose only.
+
 1. Install `conda-build` and (optionally) `boa`
 ```bash
 conda install -c conda-forge "conda-build>=3.20" colorama pip ruamel ruamel.yaml rich mamba jsonschema
@@ -22,16 +27,9 @@ anaconda login
 anaconda upload $CONDA_PREFIX/conda-bld/linux-64/sparc-<YYYY>.<MM>.<DD>-<i>.bz2
 ```
 
-If the SPARC package is finally in production, we need to merge it to `conda-forge` channel (perhaps using a different name `sparc-dft`?)
-
 
 4. Using the package
 ```bash
 conda install -c <your-channel> sparc
 ```
 This will automatically install `sparc` with `openmpi` + `scalapack` + `openblas` support. No compilation requires afterwards.
-
-5. TODOs
-- [ ] Configure the mpi-aware fftw package
-- [ ] Include mkl-variant?
-- [ ] Complete conda-forge merge once in upstream main