release: mdgrep 0.1.2 (documentation)

- version 0.1.2 in pyproject.toml and __init__.py
- CHANGELOG: [Unreleased] -> [0.1.2] with "Beim Update zu tun"
- install examples and version notes in README, BEDIENUNGSANLEITUNG,
  FUNKTIONSWEISE point to v0.1.2
- no code changes; widget files unchanged (v0.1.0)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "mdgrep"
-version = "0.1.1"
+version = "0.1.2"
 description = "Boolean full-text search (substrings, phrases, regex, AND/OR/NOT, parentheses) over Markdown and other text blocks, with CLI, Flask API and a JavaScript search widget"
 readme = "README.md"
 license = "MIT"