Move internal functions.
Move main functions.
Move actions file.
Move template tags and add a dependency loader.
Add `follet_load_dependency()` function.
Rename variable.
Move Bootstrap and Respond libraries to `includes/assets`.
Avoid using globals directly.
Refactor some filtering functions.
Add navigation as dependency.
Extend customizer as dependency and refactor loader.
Move actions and filters to more specific files.
Add custom actions to register hooks.