feat: add code size analyzer

[z0ffy]

Summary by Sourcery

Add a code size analyzer to measure and log the size of code bundles before and after obfuscation, including gzip sizes. Enhance the logging of the obfuscation process with detailed size information.

New Features:

• Introduce a CodeSizeAnalyzer class to measure and log the size of code bundles before and after obfuscation, including gzip sizes.

Enhancements:

• Add a formatSize function to convert byte sizes into human-readable formats with appropriate units.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR implements a code size analyzer feature that tracks and reports bundle size metrics before and after obfuscation. The implementation includes a new CodeSizeAnalyzer class that calculates both raw and gzipped sizes of bundles, and presents the results with percentage changes.

Class diagram for CodeSizeAnalyzer and related types

classDiagram
    class CodeSizeAnalyzer {
        - Log _log
        - SizeResult originalSize
        - SizeResult obfuscatedSize
        - number startTime
        - number endTime
        + CodeSizeAnalyzer(Log log)
        + void start(BundleList originalBundleList)
        + void end(BundleList obfuscatedBundleList)
        - SizeResult calculateBundleSize(BundleList bundleList)
        - string analyze()
        - void logResult()
        - SizeResult createEmptySizeResult()
    }
    class SizeResult {
        FormatSizeResult original
        FormatSizeResult gzip
    }
    class FormatSizeResult {
        number value
        SizeUnit unit
    }
    class SizeUnit {
        <<enumeration>>
        B
        KB
        MB
    }
    CodeSizeAnalyzer --> Log
    CodeSizeAnalyzer --> SizeResult
    SizeResult --> FormatSizeResult
    FormatSizeResult --> SizeUnit

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File-Level Changes

Change	Details	Files
Added a new CodeSizeAnalyzer class to track bundle sizes	Implemented size calculation for both original and gzipped bundles Added timing measurement for the obfuscation process Created formatted output showing size changes and percentage increases Integrated gzip compression using node:zlib	src/utils/index.ts
Added new types and enums for size analysis	Created SizeUnit enum for byte units (B, KB, MB) Added FormatSizeResult interface for size formatting Added SizeResult type for storing original and gzip sizes	src/type.ts src/utils/constants.ts
Integrated size analyzer into the main plugin flow	Modified transformIndexHtmlHandler to use the new CodeSizeAnalyzer Updated logging to include color-coded success messages Replaced manual timing with analyzer's built-in timing	src/index.ts

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[sourcery-ai]

Hey @z0ffy - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

issue: Handle edge cases where original sizes are 0 to prevent NaN or Infinity results

Add checks before division to handle cases where originalSize values are 0. Consider returning '0%' or 'N/A' in such cases.