refactor(scripts): organize scripts into subdirectories

Reorganize scripts into logical subdirectories:
- build/ - Build-related scripts (main, clean, externals, js)
- fix/ - Post-build fix scripts (main, path-aliases, external-imports, etc.)
- test/ - Test scripts (main, cover, filter)
- validate/ - Validation scripts (dist-exports, esm-named-exports, etc.)

Remove redundant prefixes (validate-*.mjs → *.mjs) and rename index.mjs to main.mjs.
Update all script paths in package.json and fix rootPath calculations for nested scripts.

Author: jdalton

scripts/babel/README.md

@@ -13,13 +13,14 @@ import { isQuiet } from '#socketsecurity/lib/argv/flags'
 import { getDefaultLogger } from '#socketsecurity/lib/logger'
 import { printHeader } from '#socketsecurity/lib/stdio/header'
 
-import { parseArgs } from './utils/parse-args.mjs'
+import { parseArgs } from '../utils/parse-args.mjs'
 
 const logger = getDefaultLogger()
 
 const rootPath = path.resolve(
   path.dirname(fileURLToPath(import.meta.url)),
   '..',
+  '..',
 )
 
 /**

scripts/clean.mjs renamed to scripts/build/clean.mjs

@@ -11,7 +11,7 @@ import { isQuiet } from '#socketsecurity/lib/argv/flags'
 import { getDefaultLogger } from '#socketsecurity/lib/logger'
 import { pluralize } from '#socketsecurity/lib/words'
 
-import { buildExternals } from './build-externals/orchestrator.mjs'
+import { buildExternals } from '../build-externals/orchestrator.mjs'
 
 const logger = getDefaultLogger()
 const printCompletedHeader = title => console.log(colors.green(`✓ ${title}`))

scripts/build-externals.mjs renamed to scripts/build/externals.mjs

@@ -9,7 +9,7 @@ import {
   analyzeMetafile,
   buildConfig,
   watchConfig,
-} from '../.config/esbuild.config.mjs'
+} from '../../.config/esbuild.config.mjs'
 import { getDefaultLogger } from '#socketsecurity/lib/logger'
 
 const logger = getDefaultLogger()