feat: implement plugin architecture and application settings with Svelte UI

- Added plugin base and loader for backend extensibility
- Implemented application settings management with config persistence
- Created Svelte-based frontend with Dashboard and Settings pages
- Added API routes for plugins, tasks, and settings
- Updated documentation and specifications
- Improved project structure and developer tools

frontend/src/pages/Dashboard.svelte

@@ -1,28 +1,48 @@
-<script>
-    import { onMount } from 'svelte';
-    import { plugins, fetchPlugins, selectedPlugin } from '../lib/stores.js';
-
-    onMount(async () => {
-        await fetchPlugins();
-    });
-
-    function selectPlugin(plugin) {
-        selectedPlugin.set(plugin);
-    }
-</script>
-
-<div class="container mx-auto p-4">
-    <h1 class="text-2xl font-bold mb-4">Available Tools</h1>
-    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
-        {#each $plugins as plugin}
-            <div 
-                class="border rounded-lg p-4 cursor-pointer hover:bg-gray-100"
-                on:click={() => selectPlugin(plugin)}
-            >
-                <h2 class="text-xl font-semibold">{plugin.name}</h2>
-                <p class="text-gray-600">{plugin.description}</p>
-                <span class="text-sm text-gray-400">v{plugin.version}</span>
-            </div>
-        {/each}
-    </div>
-</div>
+<!--
+[DEF:Dashboard:Component]
+@SEMANTICS: dashboard, plugins, tools, list
+@PURPOSE: Displays the list of available plugins and allows selecting one.
+@LAYER: UI
+@RELATION: DEPENDS_ON -> frontend/src/lib/stores.js
+
+@PROPS: None
+@EVENTS: None
+-->
+<script>
+    import { onMount } from 'svelte';
+    import { plugins, fetchPlugins, selectedPlugin } from '../lib/stores.js';
+
+    // [DEF:onMount:Function]
+    // @PURPOSE: Fetch plugins when the component mounts.
+    onMount(async () => {
+        console.log("[Dashboard][Entry] Component mounted, fetching plugins.");
+        await fetchPlugins();
+    });
+    // [/DEF:onMount]
+
+    // [DEF:selectPlugin:Function]
+    // @PURPOSE: Selects a plugin to display its form.
+    // @PARAM: plugin (Object) - The plugin object to select.
+    function selectPlugin(plugin) {
+        console.log(`[Dashboard][Action] Selecting plugin: ${plugin.id}`);
+        selectedPlugin.set(plugin);
+    }
+    // [/DEF:selectPlugin]
+</script>
+
+<div class="container mx-auto p-4">
+    <h1 class="text-2xl font-bold mb-4">Available Tools</h1>
+    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+        {#each $plugins as plugin}
+            <div 
+                class="border rounded-lg p-4 cursor-pointer hover:bg-gray-100"
+                on:click={() => selectPlugin(plugin)}
+            >
+                <h2 class="text-xl font-semibold">{plugin.name}</h2>
+                <p class="text-gray-600">{plugin.description}</p>
+                <span class="text-sm text-gray-400">v{plugin.version}</span>
+            </div>
+        {/each}
+    </div>
+</div>
+<!-- [/DEF:Dashboard] -->