refactor: clean up dead code after architect extension migration

- Remove dead code from create-release-packages.sh (architect.* filename handling)
- Remove dead code from create-release-packages.ps1 (architect.* filename handling)
- Delete obsolete templates/architecture-template.md (superseded by extensions/architect/templates/AD-template.md)
- Architect commands moved to extension in PR #57, no longer in templates/commands/

Author: kanfil

.github/workflows/scripts/create-release-packages.ps1

@@ -159,12 +159,8 @@ function Generate-Commands {
         $body = $body -replace '__AGENT__', $Agent
         $body = Rewrite-Paths -Content $body
 
-        # Determine output filename - architect commands don't get spec. prefix
-        if ($name -like 'architect.*') {
-            $outputName = $name
-        } else {
-            $outputName = "spec.$name"
-        }
+        # Determine output filename
+        $outputName = "spec.$name"
 
         # Generate output file based on extension
         $outputFile = Join-Path $OutputDir "$outputName.$Extension"

.github/workflows/scripts/create-release-packages.sh

@@ -102,13 +102,8 @@ generate_commands() {
     # Apply other substitutions
     body=$(printf '%s\n' "$body" | sed "s/{ARGS}/$arg_format/g" | sed "s/__AGENT__/$agent/g" | rewrite_paths)
 
-    # Determine output filename - architect commands don't get spec. prefix
-    local output_name
-    if [[ $name == architect.* ]]; then
-      output_name="$name"
-    else
-      output_name="spec.$name"
-    fi
+    # Determine output filename
+    local output_name="spec.$name"
 
     case $ext in
       toml)