ci: build main (lib flavor) + fix README status badge

- build.yml: push branches: ['**'] (inkl. main) statt branches-ignore [main] —
  JitPack-release.yml baut main nicht, sonst laeuft main durch keine CI.
- README-Badge: maven.yml -> build.yml, Org-Casing zrdj -> ZrdJ.

Standard: personal vault/concepts/github-workflow-standard.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: glaudeee

.github/workflows/build.yml

@@ -2,7 +2,7 @@ name: Build
 
 on:
   push:
-    branches-ignore: [main]   # main = release branch → release.yml; PRs inherit via head SHA
+    branches: ['**']   # all branches incl. main, NOT tags (tags → release flow)
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}

README.md

@@ -1,6 +1,6 @@
 [![License](https://img.shields.io/github/license/mashape/apistatus.svg?maxAge=2592000)]()
 [![](https://jitpack.io/v/ZrdJ/java-identifiers.svg)](https://jitpack.io/#ZrdJ/java-identifiers)
-![GitHub Workflow Status (branch)](https://github.com/zrdj/java-identifiers/actions/workflows/maven.yml/badge.svg)
+![GitHub Workflow Status (branch)](https://github.com/ZrdJ/java-identifiers/actions/workflows/build.yml/badge.svg)
 
 # java-identifiers