📝 added documentation using mkdocs #288

Job	Run time
gst-web image build & publish	14s
py-build image build & publish	32s
conda image build & publish	21m 53s
coturn image build & publish	14s
coturn-web image build & publish	12m 16s
gstreamer-ubuntu20.04 image build & publish	19m 28s
gstreamer-ubuntu22.04 image build & publish	18m 52s
gstreamer-ubuntu24.04 image build & publish	18m 57s
js-interposer-ubuntu20.04 image build & publish	1m 48s
js-interposer-ubuntu22.04 image build & publish	1m 40s
js-interposer-ubuntu24.04 image build & publish	4m 30s
turn-rest image build & publish	37s
infra-gcp-installer image build & publish	23s
gst-py-example-ubuntu20.04 image build & publish	5m 45s
${{ matrix.name }}${{ matrix.version_suffix }}${{ matrix.suffix }}_${{ matrix.platforms \|\| 'linux/amd64' }} build artifact extraction & upload	0s
gst-py-example-ubuntu22.04 image build & publish	5m 6s
gst-py-example-ubuntu24.04 image build & publish	4m 21s
	1h 56m 36s

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