Allow users to optionally override templates (#1319)

* Create overrides directory & readme.partial.yaml.j2

* Add bootstrap/overrides to makejinja.toml

bootstrap/overrides/readme.partial.yaml.j2

@@ -0,0 +1,5 @@
+<% Place user jinja template overrides in this file's directory %>
+<% Docs: https://mirkolenz.github.io/makejinja/makejinja.html %>
+<% Example: https://github.com/mirkolenz/makejinja/blob/main/tests/data/makejinja.toml %>
+<% Example: https://github.com/mirkolenz/makejinja/blob/main/tests/data/input1/not-empty.yaml.jinja %>
+<% Example: https://github.com/mirkolenz/makejinja/blob/main/tests/data/input2/not-empty.yaml.jinja %>

makejinja.toml

@@ -1,5 +1,5 @@
 [makejinja]
-inputs = ["./bootstrap/templates"]
+inputs = ["./bootstrap/templates","./bootstrap/overrides"]
 output = "./"
 exclude_patterns = [".mjfilter.py", "*.partial.yaml.j2"]
 data = ["./config.yaml"]