LinearAlgebra.BLAS: sort and group blas functions

[inkydragon]

• No additions or deletions.
• stdlib: Sorted exported functions
• doc: BLAS functions are grouped and sorted
• Added placeholders for missing BLAS functions

group and sort ref: http:https://www.netlib.org/blas/blasqr.pdf

[ViralBShah]

Off-topic, but thinking about further refactoring, we do want to move LinearAlgebra into its own repo (but it will still be an stdlib and in the system image).

[inkydragon]

we do want to move LinearAlgebra into its own repo

I can't wait.
Now the LinearAlgebra document is very looooong, and we only show the <h2> headings (waiting for right side TOC), which makes this document hard to read.

If LinearAlgebra is split into a separate package, then this looong document can be split into multiple pages, which will better organize the document and improve readability.

[ViralBShah]

We should split it into multiple pages anyways - can't we already do it now? It will definitely be much easier in a separate repo, where we can move faster.

@KristofferC what do we need to do to move LinearAlgebra to a new repo? I always forget a few steps.

[inkydragon]

can't we already do it now?

After some trying, I found some hard codes.

julia/doc/make.jl

Lines 27 to 32 in fd70eab

	sourcefile = joinpath(STDLIB_DIR, dir, "docs", "src")
	if dir in EXT_STDLIB_DOCS
	sourcefile = joinpath(sourcefile, "basedocs.md")
	else
	sourcefile = joinpath(sourcefile, "index.md")
	end

It looks like some modifications are needed to support multiple source files.

---

After more attempts, it looks like it is not possible to generate multi-page documents by directly inserting more md files into the STDLIB_DOCS variable.

This also explains why we let the Pkg package, which already has multi-page documents, display only a single-page doc.

julia/doc/make.jl

Line 22 in fd70eab

const EXT_STDLIB_DOCS = ["Pkg"]