0.7.1 release

This is new exciting release with a bunch of new features and breaking changes 💀

• BREAKING CHANGE: BIND-STORAGE function removed, just call MAKE-STORAGE to initialize the ECS storage.
• BREAKING CHANGE: :ECS-UNSAFE feature switch renamed to :ECS-RELEASE.
• internal change: when not in release mode, storage SoAs are now CLOS classes instead of structs, which allows for better component slot redefinition on the fly.
• Indicies data is now saved upon component redefinition.
• When the storage is not initialized with MAKE-STORAGE on first use, a correctable condition is signaled allowing to manually initialize it.
• internal change: all global variables are stored by the means of global-vars library, which boosts performance a little.
• Added ASSIGN-COMPONENT generic.
• Added storage initialization hook.
• Added DEFENTITY macro to define global, automatically initialized entity variables.
• Added RESET- helper and RESET-COMPONENT generic to reset component values to their default values.
• Added generated columns via :GENERATED-FROM slot parameter.
• Fixed bug causing incorrect systems order after LOAD-ing previously compiled code.
• Provide :MISSING-ERROR-P kwarg only to unique composite indices.
• Minor performance tweaks.
• Minor documentation improvements.

Moreover, LuckyLambda dist now tracks main branch, so there should be no discrepancies between documentation and the actual version of library code.

See changelog for a full list of changes.