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

docs/configuration.rst

@@ -97,6 +97,13 @@ libalpm and AUR related configuration. Group name can refer to architecture, e.g
 * ``sync_files_database`` - download files database from mirror, boolean, required.
 * ``use_ahriman_cache`` - use local pacman package cache instead of system one, boolean, required. With this option enabled you might want to refresh database periodically (available as additional flag for some subcommands). If set to ``no``, databases must be synchronized manually.
 
+``archive`` group
+-----------------
+
+Describes settings for packages archives management extensions.
+
+* ``keep_built_packages`` - keep this amount of built packages with different versions, integer, required. ``0`` (or negative number) will effectively disable archives removal.
+
 ``auth`` group
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