feat: separate AGPL libraries and add dynamic WASM loading

- Add WASM settings page for configuring external AGPL modules
- Implement dynamic loading for PyMuPDF, Ghostscript, and CoherentPDF
- Add Cloudflare Worker proxy for serving WASM files with CORS
- Update all affected tool pages to check WASM availability
- Add showWasmRequiredDialog for missing module configuration

Documentation:
- Update README, licensing.html, and docs to clarify AGPL components
  are not bundled and must be configured separately
- Add WASM-PROXY.md deployment guide with recommended source URLs
- Rename "CPDF" to "CoherentPDF" for consistency

Dockerfile

@@ -27,9 +27,13 @@ ARG BASE_URL
 ENV BASE_URL=$BASE_URL
 
 RUN if [ -z "$BASE_URL" ]; then \
-    npm run build -- --mode production; \
+    npm run build -- --mode production && \
+    npm run docs:build && \
+    node scripts/include-docs-in-dist.js; \
     else \
-    npm run build -- --base=${BASE_URL} --mode production; \
+    npm run build -- --base=${BASE_URL} --mode production && \
+    npm run docs:build && \
+    node scripts/include-docs-in-dist.js; \
     fi
 
 # Production stage