fix(ci): Add missing cSpell words and README sections for CI compliance

- Add 31 technical terms to cSpell dictionary (ultrathink, agentic, pyright, etc.)
- Add Table of Contents section to README.md
- Add Contributing section to README.md

.cspell.json

@@ -216,7 +216,35 @@
     "VikalpP",
     "sandboxed",
     "Sandboxing",
-    "pycache"
+    "pycache",
+    "inlines",
+    "pyproject",
+    "Spawnable",
+    "spawnable",
+    "agentic",
+    "Ghostty",
+    "Backgrounding",
+    "AUTOCOMPACT",
+    "reconnections",
+    "CLAUDEAI",
+    "blocklist",
+    "Blocklist",
+    "mcporter",
+    "SESSIONEND",
+    "tiktoken",
+    "gopls",
+    "pyright",
+    "langserver",
+    "rustup",
+    "Lockdown",
+    "Checkpointing",
+    "opusplan",
+    "ultrathink",
+    "spacebar",
+    "MSIX",
+    "NONSTREAMING",
+    "startswith",
+    "unparse"
   ],
   "ignoreWords": [
     "luongnv89",