fix(docs): align edge function docs (#47148)

## TL;DR 
aligns the remaining Phase 2 Edge Functions docs snippets with
`@supabase/server`

## Whats Fixed? 
updated outdated imports and version references, and refreshed JSON
examples to use Response.json()
where it makes sense. left non-JSON responses as is where the
integration or format actually needs them
## Ref: 
- towards COM-269 


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Documentation**
* Updated numerous Edge Function guides and examples to use modern
`npm:`/`jsr:` import specifiers instead of legacy Deno URL imports.
* Standardized success and error responses to return JSON consistently
(using `Response.json()` and equivalent helpers) and added/clarified
appropriate HTTP status codes.
* Improved example error payload shapes in several guides for clearer,
structured failures.
* **Chores**
* Refreshed version ranges in documentation and examples across SDKs and
client libraries.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

examples/edge-functions/supabase/functions/drizzle/index.ts

@@ -1,5 +1,5 @@
-import { drizzle } from 'drizzle-orm/postgres-js'
-import postgres from 'postgres'
+import { drizzle } from 'npm:drizzle-orm@^0/postgres-js'
+import postgres from 'npm:postgres@^3'
 
 import { countries } from '../_shared/schema.ts'
 

examples/edge-functions/supabase/functions/postgres-on-the-edge/index.ts

@@ -1,4 +1,4 @@
-import { Pool } from 'https://deno.land/x/postgres@v0.17.0/mod.ts'
+import { Pool } from 'jsr:@db/postgres@^0'
 
 // Create a database pool with one connection.
 const pool = new Pool(
@@ -24,16 +24,16 @@ export default {
         const result = await connection.queryObject`SELECT * FROM animals`
         const animals = result.rows // [{ id: 1, name: "Lion" }, ...]
 
-        // Encode the result as pretty printed JSON
-        const body = JSON.stringify(
-          animals,
-          (_key, value) => (typeof value === 'bigint' ? value.toString() : value),
-          2
+        const data = animals.map((animal) =>
+          Object.fromEntries(
+            Object.entries(animal).map(([key, value]) => [
+              key,
+              typeof value === 'bigint' ? value.toString() : value,
+            ])
+          )
         )
 
-        // Return the response with the correct content type header
-        return new Response(body, {
-          status: 200,
+        return Response.json(data, {
           headers: {
             'Content-Type': 'application/json; charset=utf-8',
           },
@@ -44,7 +44,7 @@ export default {
       }
     } catch (err) {
       console.error(err)
-      return new Response(String(err?.message ?? err), { status: 500 })
+      return Response.json({ error: String(err?.message ?? err) }, { status: 500 })
     }
   },
 }

examples/edge-functions/supabase/functions/restful-tasks/index.ts

@@ -3,7 +3,7 @@
 // This enables autocomplete, go to definition, etc.
 
 import { withSupabase } from 'npm:@supabase/server@^1'
-import type { SupabaseClient } from 'npm:@supabase/supabase-js@2'
+import type { SupabaseClient } from 'npm:@supabase/supabase-js@^2'
 
 interface Task {
   name: string

examples/prompts/edge-functions.md

@@ -142,7 +142,7 @@ server.listen(9999)
 ### Using npm packages in Functions
 
 ```ts
-import express from 'npm:express@4.18.2'
+import express from 'npm:express@^5'
 
 const app = express()