Moved template content in partial and reduced .gitignore

.ambient-package-update/templates/snippets/content.tpl

@@ -3,4 +3,8 @@
 This package will throw [Django system checks](https://docs.djangoproject.com/en/dev/topics/checks/)
 warnings for all known removals from Django v1.0 to today.
 
+Here's an example:
+
+![Example system check](https://raw.githubusercontent.com/ambient-innovation/django-removals/963cdef1f04b9f3f8efbe6a4a893ef4abe911e07/docs/system_check_warning.png?raw=True)
+
 It focuses on Django settings but might also add more checks in the future.

.gitignore

@@ -82,6 +82,14 @@ target/
 profile_default/
 ipython_config.py
 
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
 # PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
 __pypackages__/
 
@@ -128,7 +136,7 @@ cython_debug/
 # PyCharm
 #  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  and can be added to the global gitignore or merged into this file. For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/