refactor(experiments): improve type safety for experiment configuration

Change ExperimentId type to be value-based rather than key-based
Make experiment record types more strict with proper typing
Pass full experiment config object instead of single boolean flag
Update type definitions and usages across codebase

src/core/Cline.ts

@@ -61,7 +61,7 @@ import { OpenRouterHandler } from "../api/providers/openrouter"
 import { McpHub } from "../services/mcp/McpHub"
 import crypto from "crypto"
 import { insertGroups } from "./diff/insert-groups"
-import { EXPERIMENT_IDS } from "../shared/experiments"
+import { EXPERIMENT_IDS, experiments as Experiments } from "../shared/experiments"
 
 const cwd =
 	vscode.workspace.workspaceFolders?.map((folder) => folder.uri.fsPath).at(0) ?? path.join(os.homedir(), "Desktop") // may or may not exist but fs checking existence would immediately ask for permission which would be bad UX, need to come up with a better solution
@@ -117,7 +117,7 @@ export class Cline {
 		task?: string | undefined,
 		images?: string[] | undefined,
 		historyItem?: HistoryItem | undefined,
-		experimentalDiffStrategy: boolean = false,
+		experiments?: Record<string, boolean>,
 	) {
 		if (!task && !images && !historyItem) {
 			throw new Error("Either historyItem or task/images must be provided")
@@ -139,7 +139,7 @@ export class Cline {
 		}
 
 		// Initialize diffStrategy based on current state
-		this.updateDiffStrategy(experimentalDiffStrategy)
+		this.updateDiffStrategy(Experiments.isEnabled(experiments ?? {}, EXPERIMENT_IDS.DIFF_STRATEGY))
 
 		if (task || images) {
 			this.startTask(task, images)