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>

.github/workflows/docker-integration-tests.yaml

@@ -20,17 +20,16 @@ jobs:
 
     - name: Set permissions for log directory
       run: |
-        mkdir -p /home/runner/.memgpt/logs
-        sudo chown -R $USER:$USER /home/runner/.memgpt/logs
-        chmod -R 755 /home/runner/.memgpt/logs
+        mkdir -p /home/runner/.letta/logs
+        sudo chown -R $USER:$USER /home/runner/.letta/logs
+        chmod -R 755 /home/runner/.letta/logs
 
     - name: Build and run docker dev server
       env:
-        MEMGPT_PG_DB:   memgpt
-        MEMGPT_PG_USER: memgpt
-        MEMGPT_PG_PASSWORD: memgpt
-        MEMGPT_PG_PORT: 8888
-        MEMGPT_SERVER_PASS: test_server_token
+        LETTA_PG_DB:   letta
+        LETTA_PG_USER: letta
+        LETTA_PG_PASSWORD: letta
+        LETTA_PG_PORT: 8888
         OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
 
       run: docker compose -f dev-compose.yaml up --build -d
@@ -46,12 +45,12 @@ jobs:
 
     - name: Run tests with pytest
       env:
-        MEMGPT_PG_DB:   memgpt
-        MEMGPT_PG_USER: memgpt
-        MEMGPT_PG_PASSWORD: memgpt
-        MEMGPT_PG_PORT: 8888
-        MEMGPT_SERVER_PASS: test_server_token
-        MEMGPT_SERVER_URL: http://localhost:8083
+        LETTA_PG_DB:   letta
+        LETTA_PG_USER: letta
+        LETTA_PG_PASSWORD: letta
+        LETTA_PG_PORT: 8888
+        LETTA_SERVER_PASS: test_server_token
+        LETTA_SERVER_URL: http://localhost:8083
         OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
         PYTHONPATH: ${{ github.workspace }}:${{ env.PYTHONPATH }}
       run: |