refactor: rename packages and files to use 'flash' prefix for consistency

flash-extensions/flash-ext-web-bundler/docs/configuration.md

@@ -0,0 +1,30 @@
+# Configuration
+
+`WebBundlerConfig` is immutable and built with `WebBundlerConfig.builder()`.
+
+Key fields:
+
+- `runtimeMode`: `PROD`, `ENV`, `AUTODETECT`
+- `operationMode`: `ORCHESTRATE_ONLY`, `MANAGED`
+- `frontendType`: currently `VITE`
+- `packageManager`: `NPM`, `PNPM`, `YARN`, `BUN`
+- `installPolicy`: `AUTO_IF_LOCK_HASH_CHANGED`, `NEVER`
+- `loggingMode`: `MERGED`, `SEPARATE`, `QUIET`, `VERBOSE`
+- `commandSafetyMode`: `WARN`, `BLOCK`, `ALLOW`
+- `webRoot`, `assetsSource`, `basePath`, `devHost`, `devPort`, `watchList`
+
+Asset source is explicit and object-based:
+
+- `assetsFromFilesystem(Path.of("dist"))`
+- `assetsFromClasspath("web/dist")`
+
+Or by direct source object:
+
+- `assetsSource(FilesystemAssetsSource.of(Path.of("dist")))`
+- `assetsSource(ClasspathAssetsSource.of("web/dist"))`
+
+Validation is fail-fast:
+
+- invalid `devPort`
+- blank/invalid watch entries
+- invalid `basePath`