refactor: drop trivial Node API usage in library code

[cossssmin]

Summary by CodeRabbit

• Chores
  • Migrated path resolution utilities across the codebase to a dedicated library for consistent cross-platform file path handling
  • Optimized HTML file size calculations using modern encoding standards
  • Refined CSS preprocessing with updated encoding/decoding mechanisms
  • Updated dependencies to enhance platform compatibility

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d4d06d34-8cee-4017-9c69-71992231b59b

📥 Commits

Reviewing files that changed from the base of the PR and between 15c85cb and cd8f6fc.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (9)

• package.json
• src/config/index.ts
• src/render/index.ts
• src/serve.ts
• src/transformers/tailwindComponent.ts
• src/transformers/tailwindcss.ts
• src/utils/compileTailwindCss.ts
• src/utils/componentSources.ts
• src/utils/watchPaths.ts

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📝 Walkthrough

Walkthrough

This PR introduces a cross-platform compatibility migration by replacing Node.js built-in path utilities with the pathe library and Web standard APIs. The change adds pathe as a dependency, migrates path imports across the codebase, removes manual path separator normalization that pathe handles natively, and replaces Node Buffer methods with TextEncoder/TextDecoder for better platform independence.

Changes

pathe and Web API Migration

Layer / File(s)	Summary
Dependency addition and import migration package.json, src/config/index.ts, src/render/index.ts, src/transformers/tailwindComponent.ts, src/transformers/tailwindcss.ts, src/utils/componentSources.ts, src/utils/watchPaths.ts	Add pathe ^2.0.3 to dependencies and update all node:path imports to use pathe for resolve, dirname, relative, and extname utilities.
Path resolution normalization updates src/config/index.ts, src/utils/componentSources.ts, src/utils/watchPaths.ts	Remove manual replace(/\\/g, '/') backslash-to-forward-slash normalization from merged.content, merged.static.source in config; from componentNameFromPath relative path computation; and from glob matching in file watcher, as pathe returns forward-slash paths natively.
Buffer to TextEncoder/TextDecoder conversion src/serve.ts, src/utils/compileTailwindCss.ts	Replace Buffer.byteLength(html, 'utf-8') with new TextEncoder().encode(html).length in serve stats; replace Buffer.from(css) and result.code.toString() with TextEncoder and TextDecoder in Tailwind CSS transform pipeline.

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main objective of the PR: replacing Node.js built-in APIs (node:path, Buffer) with cross-platform alternatives (pathe, TextEncoder/TextDecoder) across multiple files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/reduce-node-apis

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