fix: real preset data for all VST2/VST3 plugins, template system with ground-truth registry

- Extracted preset data from all_plugins_v2.rpp for 14 previously broken plugins
- Fixed PLUGIN_REGISTRY entries: Kontakt 7, Gullfoss, ValhallaDelay, VC 160/76, The Glue
- Template parser falls back to PLUGIN_PRESETS when source RPP has fake data
- Substitute Transient Master (not installed) with FabFilter Pro-C 2
- All 25 plugins now load correctly in REAPER
- Added template generator scripts and ground truth references
- Cleaned up temp/debug files from output/

scripts/parse_ground_truth.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+"""Parse all_plugins_v2.rpp and generate registry code."""
+import re
+import json
+from pathlib import Path
+
+text = Path("output/all_plugins_v2.rpp").read_text(encoding="utf-8")
+
+# Match VST elements: opening tag through closing >
+# The closing > is on its own line with leading whitespace
+pattern = r'<VST "([^"]+)" ([^\n]+)\n([\s\S]*?)\n\s*>'
+matches = re.findall(pattern, text)
+
+print(f"Total VST elements found: {len(matches)}")
+
+plugins = []
+for name, rest, preset_block in matches:
+    # Parse rest: filename 0 "" uid_guid ""
+    rest_parts = rest.strip().split()
+    
+    # Find the uid_guid (contains { or <)
+    uid_guid = ""
+    for part in rest_parts:
+        if '{' in part or '<' in part:
+            uid_guid = part
+            break
+    
+    # Find filename (second token, may be quoted)
+    filename = rest_parts[0].strip('"')
+    
+    # Clean preset lines
+    preset_lines = [line.strip() for line in preset_block.strip().split('\n') if line.strip()]
+    # Remove PRESETNAME lines
+    preset_lines = [l for l in preset_lines if not l.startswith('PRESETNAME')]
+    
+    is_vst3 = name.startswith('VST3') or name.startswith('VST3i')
+    
+    # Generate a short key
+    # Remove prefix and vendor
+    clean = name.replace('VST3i: ', '').replace('VST3: ', '').replace('VSTi: ', '').replace('VST: ', '')
+    # Remove vendor in parens
+    clean = re.sub(r'\s*\([^)]+\)', '', clean).strip()
+    key = clean.replace(' ', '_')
+    
+    plugins.append({
+        'key': key,
+        'display_name': name,
+        'filename': filename,
+        'uid_guid': uid_guid,
+        'is_vst3': is_vst3,
+        'preset_lines': preset_lines,
+    })
+
+# Save as JSON for use by other scripts
+Path("output/parsed_plugins.json").write_text(json.dumps(plugins, indent=2, ensure_ascii=False))
+print(f"Saved to output/parsed_plugins.json")
+
+# Print summary
+vst3_count = sum(1 for p in plugins if p['is_vst3'])
+vst2_count = sum(1 for p in plugins if not p['is_vst3'])
+print(f"VST3: {vst3_count}, VST2: {vst2_count}")
+
+# Print a few examples
+for p in plugins[:5]:
+    print(f"\n  {p['key']}: {p['display_name']}")
+    print(f"    filename: {p['filename']}")
+    print(f"    uid_guid: {p['uid_guid']}")
+    print(f"    preset lines: {len(p['preset_lines'])}")