Feature: Dynamic document storage pathes (#916)

* Added devcontainer

* Add feature storage pathes

* Exclude tests and add versioning

* Check escaping

* Check escaping

* Check quoting

* Echo

* Escape

* Escape :

* Double escape \

* Escaping

* Remove if

* Escape colon

* Missing \

* Esacpe :

* Escape all

* test

* Remove sed

* Fix exclude

* Remove SED command

* Add LD_LIBRARY_PATH

* Adjusted to v1.7

* Updated test-cases

* Remove devcontainer

* Removed internal build-file

* Run pre-commit

* Corrected flak8 error

* Adjusted to v1.7

* Updated test-cases

* Corrected flak8 error

* Adjusted to new plural translations

* Small adjustments due to code-review backend

* Adjusted line-break

* Removed PAPERLESS prefix from settings variables

* Corrected style change due to search+replace

* First documentation draft

* Revert changes to Pipfile

* Add sphinx-autobuild with keep-outdated

* Revert merge error that results in wrong storage path is evaluated

* Adjust styles of generated files ...

* Adds additional testing to cover dynamic storage path functionality

* Remove unnecessary condition

* Add hint to edit storage path dialog

* Correct spelling of pathes to paths

* Minor documentation tweaks

* Minor typo

* improving wrapping of filter editor buttons with new storage path button

* Update .gitignore

* Fix select border radius in non input-groups

* Better storage path edit hint

* Add note to edit storage path dialog re document_renamer

* Add note to bulk edit storage path re document_renamer

* Rename FILTER_STORAGE_DIRECTORY to PATH

* Fix broken filter rule parsing

* Show default storage if unspecified

* Remove note re storage path on bulk edit

* Add basic validation of filename variables

Co-authored-by: Markus Kling <markus@markus-kling.net>
Co-authored-by: Trenton Holmes <holmes.trenton@gmail.com>
Co-authored-by: Michael Shamoon <4887959+shamoon@users.noreply.github.com>
Co-authored-by: Quinn Casey <quinn@quinncasey.com>

docs/configuration.rst

@@ -111,6 +111,14 @@ PAPERLESS_FILENAME_FORMAT=<format>
 
     Default is none, which disables this feature.
 
+PAPERLESS_FILENAME_FORMAT_REMOVE_NONE=<bool>
+    Tells paperless to replace placeholders in `PAPERLESS_FILENAME_FORMAT` that would resolve
+    to 'none' to be omitted from the resulting filename. This also holds true for directory
+    names.
+    See :ref:`advanced-file_name_handling` for details.
+
+    Defaults to `false` which disables this feature.
+
 PAPERLESS_LOGGING_DIR=<path>
     This is where paperless will store log files.