Merge pull request #846 from mr-nice/docs/projects

[RFC] docs/yoe-projects.md: add inital documentation for project configuration

docs/yoe-projects.md

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+# Yoe Projects
+
+## Idea
+
+The Yoe Distribution makes it easy to switch between projects. Before you had to switch between local.conf and bblayers.conf a lot. With the introduction of the conf/projects this got a lot easier.
+You can switch between a lot of pre made projects. A project consists of a config.conf and a layers.conf file. The layers.conf file is the bblayers.conf for that specific project. And the config.conf is everything you would normally put into your local.conf file. To choose between a configuration simpy do the following
+
+```bash
+. ./envsetup.sh beaglebone
+yoe_setup
+```
+
+After this point you are able to bitbake e.g. yoe-simple-image for that project/platform.
+
+
+## Supported projects
+
+Currently these projects are supported.
+
+* beaglebone
+* qemuarm
+* qemuppc
+* qemux86
+* unleashed
+* var-som-mx8m-nano
+* imx8mm-ddr4-evk
+* qemuarm64
+* qemuppc64
+* qemux86-64
+* unmatched
+* var-som-mx8x
+* nezha-d1
+* qemucommon
+* qemuriscv32
+* rockpi-4b
+* var-dart-imx6ul
+* visionfive
+* odroid-c4
+* qemumips
+* qemuriscv64
+* rpi4-64
+* var-som-mx8
+* visionfive2
+
+## Converting a project
+
+If you used yoe before you might want to convert a project to the new config. In the simplest case you just need to create a new directory at conf/project/jour_project_name and copy over your local.conf to config.conf and bblayers.conf to layers.conf.
+
+## Creating a new project
+
+Choose a project which asembles your needs most from the projects copy it to conf/project/jour_project_name and change it to your needs.
+
+## Contribute
+
+If you feel like your project config fits the yoe-distribution well feel free to start a pull request.