v1.1.0: Adds DOT/Graphviz and images support, plus new example flowcharts.

• Added support for DOT/Graphviz and JSON formats, alongside the original DSL format.
• Extended DSL with image nodes, positioned images, node decorations, stickers, and scatter images.
• Introduced new DSL directives (e.g. @direction, @image, @decorate, @sticker, @scatter).
• Updated documentation to describe new features and expanded CLI options.
• Added example DSL files: api-flow.dsl, decision-tree.dsl, retry-pattern.dsl, and simple-flow.dsl.