feat: add processConfiguration to exports (feature-sliced#201)

Author: ArtMan-8

.changeset/fifty-teachers-flash.md

@@ -0,0 +1,5 @@
+---
+'steiger': patch
+---
+
+Added processConfiguration to exports

packages/steiger/src/app.ts

@@ -4,7 +4,7 @@ import type { Config, Folder, Rule } from '@steiger/types'
 
 import { scan, createWatcher } from './features/transfer-fs-to-vfs'
 import { defer } from './shared/defer'
-import { $enabledRules, getEnabledRules, getGlobalIgnores, getPluginByRuleName } from './models/config'
+import { $enabledRules, getEnabledRules, getGlobalIgnores, getPluginByRuleName, processConfiguration } from './models/config'
 import { runRule } from './features/run-rule'
 import { removeGlobalIgnoreFromVfs } from './features/remove-global-ignores-from-vfs'
 import { calculateFinalSeverities } from './features/calculate-diagnostic-severities'
@@ -73,3 +73,5 @@ export const linter = {
 export function defineConfig<Rules extends Array<Rule> = Array<Rule>>(config: Config<Rules>) {
   return config
 }
+
+export { processConfiguration }