docs: add docs boilerplate (backport #22202) (#22210)

Co-authored-by: Julien Robert <julien@rbrt.fr>

.github/workflows/test.yml

@@ -843,3 +843,15 @@ jobs:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
         with:
           projectBaseDir: x/upgrade/
+
+  test-system: # no system tests in v0.50, set to match required job
+    runs-on: ubuntu-latest
+    steps:
+      - name: do nothing
+        run: echo "no system tests in v0.50"
+
+  test-system-v2: # no system tests in v0.50, set to match required job
+    runs-on: ubuntu-latest
+    steps:
+      - name: do nothing
+        run: echo "no system tests in v0.50"

docs/docs/build/_category_.json

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

docs/docs/build/build.md

@@ -0,0 +1,13 @@
+---
+sidebar_position: 0
+---
+
+# Build
+
+* [Building Apps](./building-apps/00-app-go.md) - The documentation in this section will guide you through the process of developing your dApp using the Cosmos SDK framework.
+* [Modules](./modules/README.md) - Information about the various modules available in the Cosmos SDK: Auth, Authz, Bank, Crisis, Distribution, Evidence, Feegrant, Governance, Mint, Params, Slashing, Staking, Upgrade, NFT, Consensus, Circuit, Genutil.
+* [Migrations](./migrations/01-intro.md) - See what has been updated in each release the process of the transition between versions.
+* [Packages](./packages/README.md) - Explore a curated collection of pre-built modules and functionalities, streamlining the development process.
+* [Tooling](./tooling/README.md) - A suite of utilities designed to enhance the development workflow, optimizing the efficiency of Cosmos SDK-based projects.
+* [ADR's](./architecture/README.md) - Provides a structured repository of key decisions made during the development process, which have been documented and offers rationale behind key decisions being made.
+* [REST API](https://docs.cosmos.network/api) - A comprehensive reference for the application programming interfaces (APIs) provided by the SDK.