English changes.xliff + Initial set of user docs translated xliff fil…

…es from Crowdin (#17106)

This pr adds a newly generated changes.xliff for English, which has also been uploaded to Crowdin.
This PR updates the user docs github action to upload the English changes.xliff to Crowdin if it has changed.
This pr also includes the initial set of translated user docs xliff files from Crowdin.
So far that is 20 translations of the user guide, and 7 translations of changes (what's new).
scons will see that these are newer than their markdown files, and rebuild the markdown files from these, and then build the html from the rebuilt markdown files.

.github/workflows/regenerate_english_userDocs_translation_source.yml

@@ -101,3 +101,11 @@ jobs:
         } else {
             Write-Host "Not uploading userGuide.xliff to Crowdin as it has not changed"
         }
+        $changed = git diff --name-only ${{GITHUB.SHA}}.. -- user_docs/en/changes.xliff
+        if ($changed) {
+            Write-Host "Uploading changes.xliff to Crowdin"
+            # 20 is the file ID for changes.xliff in Crowdin.
+            python appVeyor/crowdinSync.py uploadSourceFile 20 user_docs/en/changes.xliff
+        } else {
+            Write-Host "Not uploading changes.xliff to Crowdin as it has not changed"
+        }

source/setup.py

@@ -286,6 +286,7 @@ def _genManifestTemplate(shouldHaveUIAccess: bool) -> tuple[int, int, bytes]:
 			+ (
 				"__pycache__",
 				"*.md",
+				"*.xliff",
 				"*/user_docs/styles.css",
 				"*/user_docs/numberedHeadings.css",
 				"*/developerGuide.*",