Configure markdownlint and yamllint

Author: lfrancke

.markdownlint.yaml

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+---
+# All defaults or options can be checked here:
+# https://github.com/DavidAnson/markdownlint/blob/main/schema/.markdownlint.yaml
+
+# Default state for all rules
+default: true
+
+# MD013/line-length - Line length
+MD013:
+  # Number of characters
+  line_length: 9999
+  # Number of characters for headings
+  heading_line_length: 9999
+  # Number of characters for code blocks
+  code_block_line_length: 9999
+
+# MD024/no-duplicate-heading/no-duplicate-header - Multiple headings with the same content
+MD024:
+  # Only check sibling headings
+  siblings_only: true

.yamllint.yaml

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+---
+extends: default
+
+ignore: |
+  deploy/helm/**/templates
+
+rules:
+  line-length: disable
+  truthy:
+    check-keys: false
+  comments:
+    min-spaces-from-content: 1  # Needed due to https://github.com/adrienverge/yamllint/issues/443