feat: Add Gmail Catchall Labeler service with configuration and functionality

- Introduced a new Docker Compose configuration for the Gmail Catchall Labeler service.
- Implemented GmailOptions class for managing configuration settings.
- Developed GmailApiClient to interact with the Gmail API, including methods for fetching messages and managing labels.
- Created models for Gmail messages, labels, and headers.
- Added IGmailClient interface to define the contract for Gmail client implementations.
- Implemented GmailOrganizer to handle the organization of emails based on recipient addresses.
- Developed LabelNameResolver for generating label names based on local parts of email addresses.
- Created RecipientExtractor to extract local parts from email headers.
- Implemented state management with OrganizerState and StateStore for persisting state information.
- Added Worker class to manage the background processing of email organization.
- Created unit tests for GmailOrganizer, LabelNameResolver, and RecipientExtractor to ensure functionality.
- Added necessary project files and configurations for building and running the application.

compose.yml

@@ -0,0 +1,30 @@
+services:
+  gmail-catchall-labeler:
+    image: git.arnemoerman.be/arne/gmail-catchall-labeler:latest
+    restart: unless-stopped
+    environment:
+      GMAIL_CLIENT_ID: ${GMAIL_CLIENT_ID}
+      GMAIL_CLIENT_SECRET: ${GMAIL_CLIENT_SECRET}
+      GMAIL_REFRESH_TOKEN: ${GMAIL_REFRESH_TOKEN}
+      GMAIL_USER_ID: me
+      CATCHALL_DOMAIN: arnemoerman.be
+      LABEL_PREFIX: ArneM.be
+      LABEL_NAME_OVERRIDES: >-
+        {"wildewesten":"Wilde Westen","sciencealert":"Science Alert","ecopower":"EcoPower","tomscott":"Tom Scott","linkedin":"LinkedIn","degeleflamingo":"De Gele Flamingo","shopapp":"ShopApp","ccdesteiger":"CC De Steiger","leseitanist":"Le Seitanist","dewatergroep":"De Watergroep","veganbox":"VeganBox","energyid":"EnergyId"}
+      POLL_INTERVAL_SECONDS: 60
+      PROCESS_EXISTING: "true"
+      MIGRATE_CHANGED_LABELS: "true"
+      STATE_PATH: /data/state.json
+      ASPNETCORE_HTTP_PORTS: 8080
+    expose:
+      - "8080"
+    volumes:
+      - gmail-catchall-labeler-data:/data
+    deploy:
+      replicas: 1
+      restart_policy:
+        condition: any
+        delay: 5s
+
+volumes:
+  gmail-catchall-labeler-data: