Description

Addresses code review feedback to extract repeated branch kind normalization pattern. Three instances of identical conditional logic were replaced with calls to the existing normalizeBranchKind helper function.

Changes:

• Refactored dynamicViewBranchCollection validator to use normalizeBranchKind() instead of inline ternary expressions at lines 124, 142, and 162
• Added .gitignore patterns to prevent TypeScript build artifacts in src/ directories from being committed

Before:

const nestedKind = step.kind === 'alternate' || step.kind === 'alt'
  ? 'alternate'
  : 'parallel'

After:

const nestedKind = normalizeBranchKind(step.kind)

Checklist

• I've thoroughly read the latest contribution guidelines.
• I've rebased my branch onto main before creating this PR.
• My commit messages follow conventional spec
• I've added tests to cover my changes (if applicable).
• I've verified that all new and existing tests have passed locally for mobile, tablet, and desktop screen sizes.
• My change requires documentation updates.
• I've updated the documentation accordingly.

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