Rename project from Re:Link to Startover

Rebrand repository from "Re:Link" to "Startover" across the codebase. Updates include package names and scopes (@relink/* -> @startover/*), import paths, Next.js transpile settings, vitest name, UI text and docs, Dockerfile and CI/workflow names, deploy scripts and repo paths, and example/production env values. Also add auth-related env vars, an apps/web .env symlink, and small formatting/typing cleanups in several TSX/TS files and tests to accommodate the rename.

docker-compose.yml

@@ -4,13 +4,13 @@ services:
     ports:
       - "5432:5432"
     environment:
-      POSTGRES_USER: relink
-      POSTGRES_PASSWORD: relink_dev
-      POSTGRES_DB: relink_dev
+      POSTGRES_USER: startover
+      POSTGRES_PASSWORD: startover_dev
+      POSTGRES_DB: startover_dev
     volumes:
       - postgres_data:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U relink -d relink_dev"]
+      test: ["CMD-SHELL", "pg_isready -U startover -d startover_dev"]
       interval: 5s
       timeout: 5s
       retries: 5
@@ -20,11 +20,11 @@ services:
     ports:
       - "5433:5432"
     environment:
-      POSTGRES_USER: relink
-      POSTGRES_PASSWORD: relink_test
-      POSTGRES_DB: relink_test
+      POSTGRES_USER: startover
+      POSTGRES_PASSWORD: startover_test
+      POSTGRES_DB: startover_test
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U relink -d relink_test"]
+      test: ["CMD-SHELL", "pg_isready -U startover -d startover_test"]
       interval: 5s
       timeout: 5s
       retries: 5