refactor(domain): split error taxonomy into thematic modules (#636)

Move each error family out of domain/errors.ts into its own module
(base, core, provider selection/adapter, browser observation,
artifact, evidence, unknown registry, hopper, configuration) and
relocate AnalysisErrorProjection to analysisErrorProjection.
Migrate all 162 importers to the owning modules and delete
errors.ts. No re-export shims; behavior is unchanged.

src/application/JavaScriptRuntimeObservationService.ts

@@ -2,10 +2,8 @@ import type { ExecutionOptions } from "./AnalysisProvider.js";
 import type { JavaScriptRuntimeObservationPort } from "./JavaScriptRuntimeObservationPort.js";
 import { createJavaScriptRuntimeObservationEvidence } from "./JavaScriptRuntimeObservationEvidence.js";
 import type { Evidence } from "../domain/evidence.js";
-import {
-  AnalysisCapabilityUnavailableError,
-  type AnalysisError,
-} from "../domain/errors.js";
+import { AnalysisCapabilityUnavailableError } from "../domain/analysisErrorCore.js";
+import { type AnalysisError } from "../domain/analysisErrorBase.js";
 import type {
   ListJavaScriptRuntimeTargetsInput,
   ObserveJavaScriptRuntimeInput,