feat: archive package tree implementation (#153)

* store built packages in archive tree instead of repository

* write tests to support new changes

* implement atomic_move method, move files only with lock

* use generic packages tree for all repos

* lookup through archive packages before build

* add archive trigger

* add archive trigger

* regenerate docs

* gpg loader fix

* support requires repostory flag

* drop excess REQUIRES_REPOSITORY

* simplify symlionk creation

* remove generators

* fix sttyle

* add separate function for symlinks creation

* fix rebase

* add note about slicing

* smol refactoring of archive_tree class

* remove duplicate code

* fix typos

* few review fixes

* monor fixes and typos

* clean empty directories

* remove side effect from getter

* drop recursive remove

* ensure_exists now accepts only argument

* add package like guard to symlinks fix

* speedup archive_lookup processing by iterrupting cycle

* remove custom filelock

* fix naming

* remove remove flag from repo

* review fixes

* restore wrapper around filelock

* extract repository explorer to separate class

* docs update

* fix ide findings

CONTRIBUTING.md

@@ -165,6 +165,11 @@ Again, the most checks can be performed by `tox` command, though some additional
 
     # Blank line again and package imports
     from ahriman.core.configuration import Configuration
+    # Multiline import example
+    from ahriman.core.database.operations import (
+        AuthOperations,
+        BuildOperations,
+    )
     ```
 
 * One file should define only one class, exception is class satellites in case if file length remains less than 400 lines.