[Multi-User Part 1]: Enable storage of settings for plaintext files based on user account (#498)

- Partition configuration for indexing local data based on user accounts
- Store indexed data in an underlying postgres db using the `pgvector` extension
- Add migrations for all relevant user data and embeddings generation. Very little performance optimization has been done for the lookup time
- Apply filters using SQL queries
- Start removing many server-level configuration settings
- Configure GitHub test actions to run during any PR. Update the test action to run in a containerized environment with a DB.
- Update the Docker image and docker-compose.yml to work with the new application design

tests/data/config.yml

@@ -9,17 +9,6 @@ content-type:
     input-filter:
     - '*.org'
     - ~/notes/*.org
-  plugins:
-    content_plugin_1:
-      compressed-jsonl: content_plugin_1.jsonl.gz
-      embeddings-file: content_plugin_1_embeddings.pt
-      input-files:
-      - content_plugin_1_new.jsonl.gz
-    content_plugin_2:
-      compressed-jsonl: content_plugin_2.jsonl.gz
-      embeddings-file: content_plugin_2_embeddings.pt
-      input-filter:
-      - '*2_new.jsonl.gz'
 enable-offline-chat: false
 search-type:
   asymmetric: