docs: add index page for learn section (backport cosmos#18777) (cosmo…

…s#18779)

Co-authored-by: samricotta <37125168+samricotta@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: yihuang <huang@crypto.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>
Co-authored-by: samricotta <samanthalricotta@gmail.com>

CHANGELOG.md

@@ -41,7 +41,6 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * (x/gov) [#18707](https://github.com/cosmos/cosmos-sdk/pull/18707) Improve genesis validation. 
 * (server) [#18478](https://github.com/cosmos/cosmos-sdk/pull/18478) Add command flag to disable colored logs.
-* (x/auth/tx) [#18772](https://github.com/cosmos/cosmos-sdk/pull/18772) Remove misleading gas wanted from tx simulation failure log.
 
 ### Bug Fixes
 

docs/docs/basics/_category_.json

@@ -1,5 +1,5 @@
 {
-    "label": "Basics",
-    "position": 1,
+    "label": "Beginner",
+    "position": 2,
     "link": null
 }

docs/docs/core/_category_.json

@@ -1,5 +1,5 @@
 {
-    "label": "Core Concepts",
-    "position": 2,
+    "label": "Advanced",
+    "position": 3,
     "link": null
 }

docs/docs/intro/_category_.json

@@ -1,5 +1,5 @@
 {
     "label": "Introduction",
-    "position": 0,
+    "position": 1,
     "link": null
 }

docs/docs/learn.md

@@ -0,0 +1,11 @@
+---
+sidebar_position: 0
+---
+# Learn
+
+*   [Introduction](intro/00-overview.md) -  Dive into the fundamentals of Cosmos SDK with an insightful introduction,
+laying the groundwork for understanding blockchain development. In this section we provide a High-Level Overview of the SDK, then dive deeper into Core concepts such as Application-Specific Blockchains, Blockchain Architecture, and finally we begin to explore what are the main components of the SDK.
+*   [Beginner](beginner/00-app-anatomy.md) - Start your journey with beginner-friendly resources in the Cosmos SDK's "Learn"
+section, providing a gentle entry point for newcomers to blockchain development. Here we focus on a little more detail, covering the Anatomy of a Cosmos SDK Application, Transaction Lifecycles, Accounts and lastly, Gas and Fees.
+*   [Advanced](advanced/00-baseapp.md) - Level up your Cosmos SDK expertise with advanced topics, tailored for experienced
+developers diving into intricate blockchain application development. We cover the Cosmos SDK on a lower level as we dive into the core of the SDK with BaseApp, Transactions, Context, Node Client (Daemon), Store, Encoding, gRPC, REST, and CometBFT Endpoints, CLI, Events, Telementry, Object-Capability Model, RunTx recovery middleware, Cosmos Blockchain Simulator, Protobuf Documentation, In-Place Store Migrations, Configuration and AutoCLI. 

x/auth/tx/service.go

@@ -131,7 +131,7 @@ func (s txServer) Simulate(ctx context.Context, req *txtypes.SimulateRequest) (*
 
 	gasInfo, result, err := s.simulate(txBytes)
 	if err != nil {
-		return nil, status.Errorf(codes.Unknown, "%v with gas used: '%d'", err, gasInfo.GasUsed)
+		return nil, status.Errorf(codes.Unknown, "%v With gas wanted: '%d' and gas used: '%d' ", err, gasInfo.GasWanted, gasInfo.GasUsed)
 	}
 
 	return &txtypes.SimulateResponse{