chore(repo): restructure repo\n\n- move README and docs to docs/\n- group images under assets/\n- remove committed release zips and checksums\n- move scripts to scripts/\n- fix README relative paths\n- update csproj PackageIcon include\n- extend .gitignore for artifacts

Author: ruslanlap

.gitignore

@@ -2,7 +2,7 @@
 ## files generated by popular Visual Studio add-ons.
 ##
 ## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
-
+remakatag.sh
 # User-specific files
 *.rsuser
 *.suo
@@ -394,5 +394,12 @@ FodyWeavers.xsd
 *.msm
 *.msp
 
+# Project-specific artifacts
+artifacts/
+downloaded-artifacts/
+release-artifacts/
+*.zip.sha256
+SpeedTest-*.zip
+
 # JetBrains Rider
 *.sln.iml