adding code examples

codeExamples/.gitignore

codeExamples/01_first_program/example_01/main.go

codeExamples/01_first_program/example_02/main

codeExamples/01_first_program/example_02/main.go

codeExamples/01_first_program/example_03/driver

codeExamples/01_first_program/example_03/sum

codeExamples/01_first_program/example_03/sum.go

codeExamples/02_the_basics/00-types/summary/main.go

codeExamples/02_the_basics/01-variables/example_01/main.go

codeExamples/02_the_basics/02-constants/main.go

codeExamples/02_the_basics/03-enums/main.go

codeExamples/02_the_basics/04-functions/example_01/main.go

codeExamples/02_the_basics/04-functions/example_02/main.go

codeExamples/02_the_basics/04-functions/example_03/main.go

codeExamples/02_the_basics/04-functions/example_04/main.go

codeExamples/02_the_basics/04-functions/example_05/main.go

codeExamples/02_the_basics/05-pointers/example_01/main.go

...mples/02_the_basics/06-nil_zero_values/example_01/main.go

codeExamples/02_the_basics/07-controlFlow/for/main.go

...amples/02_the_basics/07-controlFlow/ifConditional/main.go