PVW-2056: Relying party howto wallet

* Fully tested A-Z bring-up verification_server with relying-pary.md.

* Changed example UL url.

* Updated as-of dates, refreshed api index README.md.

* Typos.

* Removed universal link base url examples.

* So much winning.

* Many great bigly fixes.

* Quoted usecases, issuance.

* Removed (temporary) notes.md.

* Added Wallet server installation section.

* Useless notes.

* Clarification in temporary notes paragraph.

* Better summary of DB creation.

* Better database steps.

* Idempotent verification_server schema creation.

* PEM to DER, JavaScript/TypeScript.

* Adjust note about wallet_web, pre-amble for installation section.

* Make space for config/install howto, mention usecases.

* Trailing spaces.

* More notes of thoughts whilst writing.

* Added (temporary) wallet_server setup notes.

documentation/api/README.md

@@ -1,14 +1,12 @@
 This directory contains the API documentation for the Wallet (as of this writing
-2024-07-28, specifically, the `disclosure` API for the `wallet_server`'s public
+2024-08-08, specifically, the `disclosure` API for the `wallet_server`'s public
 and private endpoints).
 
 There are a couple of documents here:
 
-  * `wallet-disclosure-postman_collection.json`: A Postman collection containing
-    API calling sessions for various scenarios, generated from recording a test
-    run;
   * `wallet-disclosure-components.openapi.yaml`: An OpenAPIv3 components library
-    which is included/used in the private and public API spec documents;
+    which is included/used in the private and public API spec documents below.
+    You shouldn't open this in a Swagger/OpenAPI editor/preview on its own;
   * `wallet-disclosure-private.openapi.yaml`: The private/internal API for the
     wallet_server's disclosure functionality;
   * `wallet-disclosure-public.openapi.yaml`: The public/external API for the