chore: migrate package name to letta (#1775)

Co-authored-by: Charles Packer <packercharles@gmail.com>
Co-authored-by: Shubham Naik <shubham.naik10@gmail.com>
Co-authored-by: Shubham Naik <shub@memgpt.ai>

.pre-commit-config.yaml

@@ -5,9 +5,9 @@ repos:
       - id: check-yaml
         exclude: 'docs/.*|tests/data/.*|configs/.*'
       - id: end-of-file-fixer
-        exclude: 'docs/.*|tests/data/.*|memgpt/server/static_files/.*'
+        exclude: 'docs/.*|tests/data/.*|letta/server/static_files/.*'
       - id: trailing-whitespace
-        exclude: 'docs/.*|tests/data/.*|memgpt/server/static_files/.*'
+        exclude: 'docs/.*|tests/data/.*|letta/server/static_files/.*'
 
   - repo: local
     hooks: