Add basic commands file

With some structure and top-level categories defined

src/commands.md

@@ -0,0 +1,33 @@
+Git commands I forget
+--------------------------
+
+## Init
+
+### Add username and email
+
+#### To local - 
+```shell
+git config --local user.name <username>
+git config --local user.email <email>
+```
+
+#### To global - 
+```shell
+git config --global user.name <username>
+git config --global user.email <email>
+```
+
+#### Folder-specific at global level -
+<!-- TODO Talk about includeif here -->
+
+## Repo
+
+## Commit
+
+## Branch
+
+## Stash
+
+## Ignore and keep
+
+## Other similar websites and inspirations