remove docs from mcp search results (#14)

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## 💸 TL;DR
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Remove blocks from devvit search results so that search like "redis"
doesn't tell you to import from `@devvit/public-api`

## 📜 Details
[Design Doc](<!-- insert Google Doc link here if applicable -->)

[Jira](<!-- insert Jira link if applicable -->)

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Author: mwood23

src/scripts/generateChunks.ts

@@ -71,6 +71,12 @@ const config: Config = {
   excludePatterns: [
     '**/node_modules/**',
     '**/.git/**',
+    '**/docs/blocks/**',
+    '**/docs/capabilities/blocks/**',
+    '**/docs/api/**',
+    '**/versioned_docs/version-0.12/blocks/**',
+    '**/versioned_docs/version-0.12/capabilities/blocks/**',
+    '**/versioned_docs/version-0.12/api/**',
     // I've found that these muddy up the search results
     '**/README.md',
     // May contain out of date information