docs: add API keys (opaque tokens) documentation

CLAUDE.md

@@ -10,10 +10,23 @@ When in doubt, follow the constitution exactly. Do not introduce new rules that
 
 ## Core Principles
 
-### Documentation-First Development
+### Documentation-first development
 
 Every feature must include comprehensive, user-focused documentation. Documentation is not an afterthought but a first-class deliverable that guides implementation. All code changes require corresponding documentation updates.
 
+### Git Commits
+
+- Do NOT include `Co-Authored-By` lines in commit messages
+
+### SDK variable names (critical)
+
+> **CRITICAL**: Use the exact variable names below in all documentation and code examples.
+
+- Node.js: `scalekit`
+- Python: `scalekit_client`
+- Go: `scalekitClient`
+- Java: `scalekitClient`
+
 ### Multi-Language SDK Consistency
 
 All code examples MUST include Node.js, Python, Go, and Java implementations with consistent variable naming conventions. Examples must show both success and error handling paths. Security implications must be explained for each implementation.

src/configs/redirects.config.ts

@@ -273,7 +273,8 @@ export const redirects = {
   '/m2m/authenticate-scalekit-api': '/guides/authenticate-scalekit-api/',
   '/m2m/api-auth-for-m2m-clients': '/guides/m2m/api-auth-m2m-clients/',
   '/m2m/external-ids-and-metadata': '/guides/external-ids-and-metadata/',
-  '/m2m/scopes': '/guides/m2m/scopes/',
+  '/m2m/scopes': '/authenticate/m2m/api-auth-quickstart/',
+  '/guides/m2m/scopes/': '/authenticate/m2m/api-auth-quickstart/',
   '/reference/api/m2m-clients': '/guides/m2m/api-auth-m2m-clients/',
 
   // =============================================================================

src/configs/sidebar.config.ts

@@ -80,7 +80,7 @@ export const sidebar = [
         items: [
           // 'guides/m2m/overview', TODO: It uses M2M context, and older context. Hiding it until we are sure to open it up
           'authenticate/m2m/api-auth-quickstart',
-          'guides/m2m/scopes',
+          'authenticate/m2m/api-keys',
           // 'guides/m2m/api-auth-m2m-clients', TODO: Translate this as guides for future
         ],
       },