feat: add build and upload scripts for Forgejo PyPI, update version management

.pypirc.example

@@ -0,0 +1,25 @@
+# .pypirc.example
+# Configuration file for uploading packages to Forgejo PyPI
+#
+# This file is a template - copy it to .pypirc and fill in your credentials:
+#   cp .pypirc.example .pypirc
+#
+# IMPORTANT: Never commit .pypirc to version control!
+# It should already be in .gitignore
+
+[distutils]
+index-servers =
+    forgejo
+
+[forgejo]
+repository = https://git.him-tools.de/api/packages/HIM-public/pypi
+username = __token__
+password = YOUR_FORGEJO_ACCESS_TOKEN_HERE
+
+# How to get your Forgejo access token:
+# 1. Log in to your Forgejo instance: https://git.him-tools.de
+# 2. Go to Settings > Applications > Generate New Token
+# 3. Select 'write:package' scope
+# 4. Copy the token and paste it above (replace YOUR_FORGEJO_ACCESS_TOKEN_HERE)
+#
+# Note: The username should always be "__token__" when using an access token