fix: align everything server resource URI numbering with array indices

Fixes issue where array indices (0-based) didn't match URI numbers (1-based),
causing confusion where:
- Resource at index 0 was accessed via 'test://static/resource/1'
- Even indices (text resources) mapped to odd URI numbers

Changes:
- Resource URIs now use 0-based numbering to match array indices
- Resource 0 is now accessed via 'test://static/resource/0'
- Even indices now map to even URI numbers (more intuitive)

Resolves #475

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Ola Hungerford <olaservo@users.noreply.github.com>

Author: claude[bot]

src/everything/everything.ts

@@ -254,7 +254,7 @@ export const createServer = () => {
   };
 
   const ALL_RESOURCES: Resource[] = Array.from({ length: 100 }, (_, i) => {
-    const uri = `test://static/resource/${i + 1}`;
+    const uri = `test://static/resource/${i}`;
     if (i % 2 === 0) {
       return {
         uri,
@@ -316,7 +316,7 @@ export const createServer = () => {
     const uri = request.params.uri;
 
     if (uri.startsWith("test://static/resource/")) {
-      const index = parseInt(uri.split("/").pop() ?? "", 10) - 1;
+      const index = parseInt(uri.split("/").pop() ?? "", 10);
       if (index >= 0 && index < ALL_RESOURCES.length) {
         const resource = ALL_RESOURCES[index];
         return {