feat: update counter and todos to use automatic method dispatch

[adnaan]

Summary

Updates counter and todos examples to use the new Controller pattern with automatic method dispatch instead of implementing the Store interface with a Change() switch statement.

Depends on: livetemplate/livetemplate#66

Changes

counter/main.go

• Removed Change() method with switch statement
• Added individual action methods: Increment(), Decrement(), Reset()

todos/main.go

• Removed Change() method with switch statement
• Added individual action methods: Add(), Toggle(), Delete(), Search(), Sort(), NextPage(), PrevPage(), GotoPage(), ClearCompleted()

Before vs After

// BEFORE: Switch statement
func (s *Counter) Change(ctx *ActionContext) error {
    switch ctx.Action {
    case "increment": s.Count++
    case "decrement": s.Count--
    case "reset": s.Count = 0
    }
    return nil
}

// AFTER: Direct method dispatch
func (s *Counter) Increment(ctx *ActionContext) error {
    s.Count++
    return nil
}

func (s *Counter) Decrement(ctx *ActionContext) error {
    s.Count--
    return nil
}

func (s *Counter) Reset(ctx *ActionContext) error {
    s.Count = 0
    return nil
}

Test plan

• counter example builds and tests pass
• todos example builds and tests pass

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR refactors the counter and todos examples to use the new Controller pattern with automatic method dispatch, eliminating the need for manual Change() switch statements.

• Replaces switch-based action routing with direct method dispatch
• Adds comprehensive documentation explaining the Controller pattern
• Cleans up unused dependencies from go.mod/go.sum

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
counter/main.go	Refactored from single Change() switch to individual Increment(), Decrement(), and Reset() methods with automatic dispatch
todos/main.go	Refactored from single Change() switch to nine individual action methods (Add(), Toggle(), Delete(), Search(), Sort(), NextPage(), PrevPage(), GotoPage(), ClearCompleted())
counter/go.mod	Removed unused dependencies (charmbracelet, muesli, modelcontextprotocol, and other terminal UI libraries)
counter/go.sum	Updated checksums to reflect dependency removals
todos/go.mod	Removed same set of unused dependencies as counter
todos/go.sum	Updated checksums to reflect dependency removals

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