chore: update version to 2.0.5 and enhance README with project filter…

…ing option

chore: bump version to 2.0.4

fix: correct binary and main paths in package.json

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Co-Authored-By: Claude <noreply@anthropic.com>

feat: update package structure and add tsdown for build process

- Changed main entry point from `dist/index.js` to `dist/cli/index.js`
- Updated bin command for `ccstat` to point to the new CLI entry
- Replaced build script with `tsdown` for streamlined TypeScript compilation
- Added `tsdown` as a dependency
- Created `tsdown.config.ts` for configuration of the build process
- Included additional dependencies in `package-lock.json` for new modules

Merge pull request #91 from ktny/fix/npx-execution-error

fix: npx ccstat実行エラーを修正

fix: semantic-release設定を修正してブランチ保護ルールとの競合を回避

@semantic-release/gitプラグインを削除し、GitHubリリースのみに依存する設定に変更
これによりmainブランチへの直接プッシュを回避

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Co-Authored-By: Claude <noreply@anthropic.com>

fix: update installation instructions to use version v1.0.0

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Co-Authored-By: Claude <noreply@anthropic.com>

fix: update installation instructions to use version v0.1.3

fix: resolve ldflags syntax error in release workflow

- Remove problematic BUILD_FLAGS variable that caused quoting issues
- Inline ldflags directly in go build commands
- Fixes release workflow failure for v0.1.2

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Co-Authored-By: Claude <noreply@anthropic.com>

fix: correct ldflags syntax in release workflow

- Fix ldflags quoting: -ldflags=-s → -ldflags="-s -w ..."
- Resolves 'flag provided but not defined: -w' error
- Enables proper version injection in release builds

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Co-Authored-By: Claude <noreply@anthropic.com>