Build dependencies cmake and scdoc not mentioned in README

The title is self-descriptive.

I am packaging turnstile for gentoo linux, in my own overlay [66-svmgr](https://github.com/pramodvu1502/66-svmgr-gentoo-overlay].

The turnstile project uses a fully "standard" workflow, so I had no need to use custom build and install scripts.

However, the meson build complains about missing scdoc package.
It is needed for generating man pages, and in the build output it is infact used.

IDK where cmake is used, but meson (or it's conf-file) wants it.

Kindly fix the README to incorporate the build-deps.

[PiyushPatle26]

is this open ? and what more changes do we need to make in the readme files ???

Basically, I package components replacing systemd, in my gentoo overlay (package repo)...
Here's the ebuild for turnstile: https://github.com/pramodvu1502/66-svmgr-gentoo-overlay/blob/main/sys-apps/turnstile/turnstile-0.1.10.ebuild
(It uses the "default" build commands and options, thus I haven't written the build/install scripts)

The build system complains of missing scdoc when building, if scdoc is not intalled.
When I pull it as a build dependency, the build gets satisfied.

cmake too is mentioned in the build output.
Unfortunately I can't uninstall cmake from my system, so I can't really test if the build works without it.

I am suggesting that you add atleast scdoc as a build dependency in the README.