feat: allow to use single web instance for all repositories (#114)

* Allow to use single web instance for any repository

* some improvements

* drop includes from user home directory, introduce new variables to docker

The old solution didn't actually work as expected, because devtools
configuration belongs to filesystem (as well as sudo one), so it was
still required to run setup command.

In order to handle additional repositories, the POSTSETUP and PRESETUP
commands variables have been introduced. FAQ has been updated as well

* raise 404 in case if repository is unknown

tests/ahriman/core/formatters/conftest.py

@@ -3,12 +3,13 @@ import pytest
 from pathlib import Path
 
 from ahriman.core.formatters import AurPrinter, ConfigurationPrinter, ConfigurationPathsPrinter, PackagePrinter, \
-    PatchPrinter, StatusPrinter, StringPrinter, TreePrinter, UpdatePrinter, UserPrinter, ValidationPrinter, \
-    VersionPrinter
+    PatchPrinter, RepositoryPrinter, StatusPrinter, StringPrinter, TreePrinter, UpdatePrinter, UserPrinter, \
+    ValidationPrinter, VersionPrinter
 from ahriman.models.aur_package import AURPackage
 from ahriman.models.build_status import BuildStatus
 from ahriman.models.package import Package
 from ahriman.models.pkgbuild_patch import PkgbuildPatch
+from ahriman.models.repository_id import RepositoryId
 from ahriman.models.user import User
 
 
@@ -76,6 +77,17 @@ def patch_printer(package_ahriman: Package) -> PatchPrinter:
     return PatchPrinter(package_ahriman.base, [PkgbuildPatch("key", "value")])
 
 
+@pytest.fixture
+def repository_printer(repository_id: RepositoryId) -> RepositoryPrinter:
+    """
+    fixture for repository printer
+
+    Returns:
+        RepositoryPrinter: repository printer test instance
+    """
+    return RepositoryPrinter(repository_id)
+
+
 @pytest.fixture
 def status_printer() -> StatusPrinter:
     """