Fix build system for zero-dependency bundling

Ensure all external packages are properly bundled as self-contained
modules without code splitting or shared chunks. This creates a true
zero-dependency CLI where all dependencies are bundled in dist/.

Changes:
- Bundle ink as self-contained module like ink-table
- Separate rollup configs for each external module
- Prevent code splitting with inlineDynamicImports
- Each external package now fully self-contained

Author: jdalton