webstatic status: Markdown-Rendering im Terminal + LICENSE mit Dep-Lizenzen

- MarkdownConsoleRenderer.cs: eigener Markdig-AST→ANSI-Renderer (keine
  neue NuGet-Dependency). Unterstützt Headings, Paragraphs, Listen,
  Code-Blöcke, Blockquotes, Tabellen, Thematic Breaks, Inline-Formatierung
  (bold/italic/code/links). ANSI-Styling mit Farben.
- Program.cs: 'webstatic status' / 'webstatic --status' Subcommand —
  rendert README.md der Site im Terminal (Default: cwd, --root überschreibt).
  Graceful error wenn README.md fehlt. Help-Eintrag ergänzt.
- LICENSE: Third-Party-Dependency-Lizenzen ergänzt (Markdig BSD-2-Clause,
  YamlDotNet MIT) mit vollständigen Lizenztexten, Links und Kompatibilitäts-Tabelle.
- README.md: aktualisiert als Status-Dokument (neuer status-Befehl,
  CLI-Befehle-Tabelle, bereinigte Environments, LICENSE-Verweis).

LICENSE

@@ -19,3 +19,73 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+---
+
+## Third-Party Dependencies
+
+This software uses the following third-party NuGet packages. Their license
+terms apply to the respective portions of the distributed binaries. The source
+code of GCBoK.WebStaticBuilder itself remains under the MIT license above.
+
+### Markdig
+
+- **Package:** Markdig (https://www.nuget.org/packages/Markdig)
+- **Purpose:** Markdown → HTML rendering (CommonMark compliant, extensible)
+- **License:** BSD-2-Clause (https://github.com/xoofx/markdig/blob/master/license.txt)
+- **Copyright:** © Alexandre Mutel (xoofx)
+- **Repository:** https://github.com/xoofx/markdig
+
+  > Redistribution and use in source and binary forms, with or without
+  > modification, are permitted provided that the following conditions are met:
+  > 1. Redistributions of source code must retain the above copyright notice,
+  >     this list of conditions and the following disclaimer.
+  > 2. Redistributions in binary form must reproduce the above copyright notice,
+  >     this list of conditions and the following disclaimer in the documentation
+  >     and/or other materials provided with the distribution.
+  >
+  > THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  > AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  > IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  > ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+  > LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  > CONSEQUENTIAL DAMAGES HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+  > WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  > OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+  > ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+### YamlDotNet
+
+- **Package:** YamlDotNet (https://www.nuget.org/packages/YamlDotNet)
+- **Purpose:** YAML frontmatter parsing for Markdown content files
+- **License:** MIT (https://github.com/aaubry/YamlDotNet/blob/master/LICENSE)
+- **Copyright:** © Antoine Aubry and contributors
+- **Repository:** https://github.com/aaubry/YamlDotNet
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+
+### Summary
+
+| Package     | License       | Compatible with MIT? |
+|-------------|---------------|----------------------|
+| Markdig     | BSD-2-Clause  | Yes (permissive)     |
+| YamlDotNet  | MIT           | Yes (same license)   |
+
+Both dependencies are permissive licenses compatible with MIT. No copyleft
+(GPL/AGPL/LGPL) components are used.