(feat): implements captcha - #646

src/app/common/common.module.ts

src/app/common/components/captcha/captcha.component.html

src/app/common/components/captcha/captcha.component.scss

src/app/common/components/captcha/captcha.component.ts

src/app/common/components/captcha/captcha.service.ts

src/app/modules/captcha/captcha.component.html

src/app/modules/captcha/captcha.component.scss

src/app/modules/captcha/captcha.component.spec.ts

src/app/modules/captcha/captcha.component.ts

src/app/modules/captcha/captcha.module.ts

src/app/modules/captcha/recaptcha/recaptcha.component.ts

src/app/modules/captcha/recaptcha/recaptcha.service.ts

src/app/modules/forms/register/register.html

src/app/modules/forms/register/register.ts