feat: consolidate graphile-misc-plugins into graphile-settings and add @RequiredInput plugin

- Move all plugin source files from graphile-misc-plugins/src/ to graphile-settings/src/plugins/
- Move all tests from graphile-misc-plugins/__tests__/ to graphile-settings/__tests__/
- Update all imports to use local paths instead of graphile-misc-plugins package
- Update graphile-settings package.json with dependencies from graphile-misc-plugins
- Remove graphile-misc-plugins package from workspace
- Implement RequiredInputPlugin: reads @RequiredInput smart tag and makes mutation input fields non-nullable
- Add RequiredInputPreset to ConstructivePreset
- Add comprehensive tests for RequiredInputPlugin (14 test cases)

Author: pyramation

graphile/graphile-misc-plugins/CHANGELOG.md

@@ -1,5 +1,5 @@
-import { PublicKeySignature } from '../src/PublicKeySignature';
-import type { PublicKeyChallengeConfig } from '../src/PublicKeySignature';
+import { PublicKeySignature } from '../src/plugins/PublicKeySignature';
+import type { PublicKeyChallengeConfig } from '../src/plugins/PublicKeySignature';
 
 const defaultConfig: PublicKeyChallengeConfig = {
   schema: 'app_private',

graphile/graphile-misc-plugins/README.md

@@ -3,7 +3,7 @@ import {
   _pgTypeToGqlType,
   _buildFieldMeta,
   _cachedTablesMeta,
-} from '../src/meta-schema';
+} from '../src/plugins/meta-schema';
 import {
   parse,
   print,