chore: remove examples/externalPlugins.js and pluginLoader.ts, update imports to .js

Deleted `examples/externalPlugins.js` and `pluginLoader.ts` as they are no longer used. Updated all `.ts` imports to `.js` across the codebase. Added `MemberOf` to `VerbType` and filtered disabled augmentations in `executeAugmentationPipeline`. Updated documentation to reflect new augmentation registration process. Removed deprecated `allowImportingTsExtensions` from `tsconfig.json`.

src/utils/distance.ts

@@ -2,7 +2,7 @@
  * Distance functions for vector similarity calculations
  */
 
-import { DistanceFunction, Vector } from '../coreTypes.ts'
+import { DistanceFunction, Vector } from '../coreTypes.js'
 
 /**
  * Calculates the Euclidean distance between two vectors

src/utils/embedding.ts

@@ -2,7 +2,7 @@
  * Embedding functions for converting data to vectors
  */
 
-import { EmbeddingFunction, EmbeddingModel, Vector } from '../coreTypes.ts'
+import { EmbeddingFunction, EmbeddingModel, Vector } from '../coreTypes.js'
 
 /**
  * Simple character-based embedding function

src/utils/index.ts

@@ -1,2 +1,2 @@
-export * from './distance.ts'
-export * from './embedding.ts'
+export * from './distance.js'
+export * from './embedding.js'