Add README

README

+HOA Inventory Label Generator
+=============================
+
+This tooling generates labels from Information defined in https://pad.stratum0.org/p/inventar_eventfoo
+
+Define boxes in this way:
+
+ > Box: Geschirrhandtücher
+ > * 60x40
+ > * FIXME kg
+ > * Geschirrhandtücher
+
+Set-Up
+------
+
+  $ python3 -m venv venv
+  $ source venv/bin/activate
+  $ pip install -r REQUIREMENTS.txt
+
+Re-Use existing venv
+--------------------
+
+  $ source venv/bin/activate
+
+List all defined boxes
+----------------------
+
+  $ ./main.py list
+  geschirrhandtucher                                 Geschirrhandtücher (60x40 | FIXME kg)
+  einwegstuff                                        Einwegstuff ( | FIXME kg)
+  desi-spender                                       Desi-Spender (60x40 | FIXME kg)
+  (...)
+
+Generate Labels
+---------------
+
+A PDF with all boxes:
+
+  $ ./main.py print all
+  inventory-label-gen/tmp/2023-05-07-19-14_all.pdf  # will print the complete path to the file
+
+A PDF with specific boxes:
+* You can list as many boxes as you want.
+* You can either use the slug or the complete title.
+  When using the title: Make sure to quote as needed.
+
+  $ ./main.py print tassen-6 "HT-Verbinder & Siphons"
+  inventory-label-gen/tmp/2023-05-07-19-15_tassen-6_ht-verbinde....pdf