📝 added documentation using mkdocs #285

Job	Run time
gst-web image build & publish	24s
py-build image build & publish	30s
conda image build & publish	5m 53s
coturn image build & publish	26s
coturn-web image build & publish	6m 11s
gstreamer-ubuntu20.04 image build & publish	6m 3s
gstreamer-ubuntu22.04 image build & publish	6m 1s
gstreamer-ubuntu24.04 image build & publish	6m 8s
js-interposer-ubuntu20.04 image build & publish	1m 49s
js-interposer-ubuntu22.04 image build & publish	1m 57s
js-interposer-ubuntu24.04 image build & publish	4m 14s
turn-rest image build & publish	35s
infra-gcp-installer image build & publish	34s
${{ matrix.name }}${{ matrix.version_suffix }}${{ matrix.suffix }}_${{ matrix.platforms \|\| 'linux/amd64' }} build artifact extraction & upload	0s
${{ matrix.name }}${{ matrix.version_suffix }} image build & publish	0s
	40m 45s

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