Added About, Examples, Usage folders with a few content

docs/about.markdown

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+---
+layout: page
+title: About
+permalink: /about/
+---
+
+This is the base Jekyll theme. You can find out more info about customizing your Jekyll theme, as well as basic Jekyll usage documentation at [jekyllrb.com](https://jekyllrb.com/)
+
+You can find the source code for Minima at GitHub:
+[jekyll][jekyll-organization] /
+[minima](https://github.com/jekyll/minima)
+
+You can find the source code for Jekyll at GitHub:
+[jekyll][jekyll-organization] /
+[jekyll](https://github.com/jekyll/jekyll)
+
+
+[jekyll-organization]: https://github.com/jekyll

docs/examples.markdown

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+---
+layout: page
+title: Examples
+permalink: /examples/
+---
+
+### Changing C++/C version
+
+Simple example changing C++ to version 20 and C standard to the version 11
+
+```toml
+[target.example]
+type = "executable"
+compile-features = [ "cxx_std_20", "c_std_11" ]
+```
+
+### Import from another Git repository
+
+Importing an existing project called Zydis to my project
+
+tag is optional but you can target any branch with it
+
+```toml
+[fetch-content]
+zydis = { git = "https://github.com/zyantific/zydis.git", tag = "v3.1.0" }
+
+[target.example]
+type = "executable"
+link-libraries = ["zydis"]
+```
+
+### Import from another folder
+
+Importing an existing project called Zydis to my project
+
+tag is optional but you can target any branch with it
+
+```toml
+[fetch-content]
+zydis = { git = "https://github.com/zyantific/zydis.git", tag = "v3.1.0" }
+
+[target.example]
+type = "executable"
+link-libraries = ["zydis"]
+```

docs/usage.markdown

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+---
+layout: page
+title: Usage
+permalink: /usage/
+---
+
+cmkr parses cmake.toml files (using toml11 by Toru Niina) at the project directory. A basic hello world format with the minimum required fields:
+
+```toml
+[cmake]
+minimum = "3.15"
+
+[project]
+name = "app"
+version = "0.1.0"
+
+[target.app]
+type = "executable"
+sources = ["src/main.cpp"]
+```
+
+**NOTE**: The documentation is currently a work-in-progress due to breaking changes since `0.1.4`. For examples you can check the [cmkr topic](https://github.com/topics/cmkr).
+
+The cmkr executable can be run from the command-line:
+
+```
+Usage: cmkr [arguments]
+arguments:
+    init    [executable|library|shared|static|interface] Starts a new project in the same directory.
+    gen                                                  Generates CMakeLists.txt file.
+    build   <extra cmake args>                           Run cmake and build.
+    install                                              Run cmake --install. Needs admin privileges.
+    clean                                                Clean the build directory.
+    help                                                 Show help.
+    version                                              Current cmkr version.
+```
+
+The build command invokes cmake and the default build-system on your platform (unless a generator is specified), it also accepts extra cmake build arguments:
+
+```
+cmkr build --config Release 
+```