Expand ignored path configurations

In order to avoid spurious results and to improve efficiency, automatically generated or externally maintained files
should be excluded from automated processes. The coverage of ignore configurations is hereby expanded to cover more
paths containing such files.

Author: per1234

.codespellrc

@@ -3,7 +3,7 @@
 [codespell]
 # In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
 ignore-words-list = ot,porperties,propert
-skip = ./.git,./.licenses,**/go.mod,**/go.sum,./package-lock.json,./poetry.lock,./yarn.lock,./arduino-lint,./arduino-lint.exe,./internal/rule/rulefunction/testdata/libraries/MisspelledSentenceParagraphValue/library.properties,./site
+skip = ./.git,./.licenses,**/go.mod,**/go.sum,__pycache__,./package-lock.json,./poetry.lock,./yarn.lock,./arduino-lint,./arduino-lint.exe,./internal/rule/rulefunction/testdata/libraries/MisspelledSentenceParagraphValue/library.properties,./site
 builtin = clear,informal,en-GB_to_en-US
 check-filenames =
 check-hidden =

.ecrc

@@ -1,5 +1,7 @@
 {
   "Exclude": [
+    "^\\.git[/\\\\]",
+    "__pycache__[/\\\\]",
     "^LICENSE\\.txt$",
     "^poetry\\.lock$",
     "^\\.licenses/",

.markdownlintignore

@@ -0,0 +1,3 @@
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown/.markdownlintignore
+.licenses/
+__pycache__/

.prettierignore

@@ -6,6 +6,7 @@
 
 # Generated files
 /.licenses/
+__pycache__/
 
 # Test files
 /internal/rule/schema/testdata/input/invalid-schema.json