feat: Add README files for various modules and routes

src/routes/idaa/README.md

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+# IDAA Integration Module
+
+This module integrates features from the Aether (AE) application into the IDAA (International Doctors in Alcoholics Anonymous) website, which is powered by a system called Novi. The integration is achieved by embedding Aether pages within iframes inside the Novi site.
+
+This directory (`src/routes/idaa`) contains the Svelte routes that correspond to the pages on the main IDAA site.
+
+## Architecture
+
+The integration uses a multi-step iframe-based approach:
+
+1.  **Novi Page:** A page on the IDAA website contains a snippet of code that loads a static HTML file from this Aether project's `static/` directory into an iframe.
+2.  **Static HTML Bridge:** The static file (e.g., `static/idaa_novi_iframe_archives.html`) acts as a bridge. It contains JavaScript that:
+    a.  Executes within the context of the Novi site, allowing it to access Novi-specific data like the current user's unique ID (`<%=Novi.User.CustomerUniqueId%>`).
+    b.  Uses the Novi user ID to make a call to the Novi API to get more user details (like email and full name).
+    c.  Uses the retrieved user details to construct a URL for the actual Aether application page.
+    d.  Loads the Aether page into a nested iframe on the static page.
+3.  **Aether Application:** The final Aether page (e.g., `/idaa/archives`) receives the user information via URL parameters and displays the relevant content.
+
+This architecture allows the Aether application to securely authenticate and identify the Novi user without a complex SSO integration.
+
+## Sub-modules
+
+The IDAA integration includes the following features, each corresponding to a route in this directory and a static HTML bridge file.
+
+### IDAA - Archives
+
+-   **Route:** `/idaa/archives`
+-   **Bridge File:** `static/idaa_novi_iframe_archives.html`
+-   **Functionality:** Provides access to the Aether Archives module, allowing IDAA members to view and search archived content.
+
+### IDAA - Bulletin Board (BB)
+
+-   **Route:** `/idaa/bb`
+-   **Bridge File:** `static/idaa_novi_iframe_bulletin_board.html`
+-   **Functionality:** Provides a bulletin board or forum feature, powered by the Aether Posts module.
+
+### IDAA - Recovery Meetings
+
+-   **Route:** `/idaa/recovery_meetings`
+-   **Bridge File:** `static/idaa_novi_iframe_recovery_meetings.html`
+-   **Functionality:** Displays a list of recovery meetings. This may also integrate with a Jitsi meeting interface (`idaa_novi_iframe_jitsi_meeting.html`).