refactor: rename manifest metadata fields and improve error display

Rename wrapperRepo→packageRepo, marketingSite→marketingUrl,
docsUrl→docsUrls (array), remove supportSite. Add display_src/display_dbg
helpers to Error. Fix DepInfo description type to LocaleString. Update
web UI, SDK bindings, tests, and fixtures to match. Clean up cli_attach
error handling and remove dead commented code.

sdk/package/lib/test/inputSpecBuilder.test.ts

@@ -393,12 +393,11 @@ describe('values', () => {
             id: 'testOutput',
             title: '',
             license: '',
-            wrapperRepo: '',
+            packageRepo: '',
             upstreamRepo: '',
-            supportSite: '',
-            marketingSite: '',
+            marketingUrl: '',
             donationUrl: null,
-            docsUrl: '',
+            docsUrls: [],
             description: {
               short: '',
               long: '',

sdk/package/lib/test/output.sdk.ts

@@ -9,12 +9,11 @@ export const sdk = StartSdk.of()
       id: 'testOutput',
       title: '',
       license: '',
-      wrapperRepo: '',
+      packageRepo: '',
       upstreamRepo: '',
-      supportSite: '',
-      marketingSite: '',
+      marketingUrl: '',
       donationUrl: null,
-      docsUrl: '',
+      docsUrls: [],
       description: {
         short: '',
         long: '',