Git Add

Adds content to the index or staging area.

Adds a list of file:
```
git add <files>
```
Adds all files including deleted ones:
```
git add -A
```
Add all text files in current dir:
```
git add *.txt
```
Add all text file in the project:
```
git add "*.txt*"
```
Adds all files in directory:
```
git add views/layouts/
```