Add samples for DES-ECB, wrap with template and unwrap with template

[sushrb]

Description of changes:

The samples and files added in this pull request include:

• DES_ECB (src/encrypt/des_ecb.c)
• WRAP_TEMPLATE (src/wrapping/wrap_with_template.c)
• UNWRAP_WITH_TEMPLATE (src/wrapping/unwrap_with_template.c)