Move to subdirs

diff --git a/cli.html b/cli/index.html
similarity index 100%
rename from cli.html
rename to cli/index.html

diff --git a/code.html b/code/index.html
similarity index 100%
rename from code.html
rename to code/index.html

diff --git a/snippets.html b/snippets/index.html
similarity index 100%
rename from snippets.html
rename to snippets/index.html