Refactors calendar project structure and build configuration

Consolidates V2 codebase into main project directory
Updates build script to support simplified entry points
Removes redundant files and cleans up project organization

Simplifies module imports and entry points for calendar application

wwwroot/css/calendar-base.css

@@ -0,0 +1,66 @@
+/* V2 Base - Shared variables */
+
+:root {
+  /* Grid measurements */
+  --hour-height: 64px;
+  --time-axis-width: 60px;
+  --grid-columns: 7;
+  --day-column-min-width: 200px;
+  --day-start-hour: 6;
+  --day-end-hour: 18;
+  --header-height: 70px;
+
+  /* Colors - UI */
+  --color-border: #e0e0e0;
+  --color-surface: #fff;
+  --color-background: #f5f5f5;
+  --color-background-hover: #f0f0f0;
+  --color-background-alt: #fafafa;
+  --color-text: #333333;
+  --color-text-secondary: #666;
+  --color-primary: #1976d2;
+  --color-team-bg: #e3f2fd;
+  --color-team-text: #1565c0;
+
+  /* Colors - Grid */
+  --color-hour-line: rgba(0, 0, 0, 0.2);
+  --color-grid-line-light: rgba(0, 0, 0, 0.05);
+  --color-unavailable: rgba(0, 0, 0, 0.02);
+
+  /* Named color palette for events (fra V1) */
+  --b-color-red: #e53935;
+  --b-color-pink: #d81b60;
+  --b-color-magenta: #c200c2;
+  --b-color-purple: #8e24aa;
+  --b-color-violet: #5e35b1;
+  --b-color-deep-purple: #4527a0;
+  --b-color-indigo: #3949ab;
+  --b-color-blue: #1e88e5;
+  --b-color-light-blue: #03a9f4;
+  --b-color-cyan: #3bc9db;
+  --b-color-teal: #00897b;
+  --b-color-green: #43a047;
+  --b-color-light-green: #8bc34a;
+  --b-color-lime: #c0ca33;
+  --b-color-yellow: #fdd835;
+  --b-color-amber: #ffb300;
+  --b-color-orange: #fb8c00;
+  --b-color-deep-orange: #f4511e;
+
+  /* Base mix for color-mix() function */
+  --b-mix: #fff;
+
+  /* Shadows */
+  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
+  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
+
+  /* Transitions */
+  --transition-fast: 150ms ease;
+}
+
+* { box-sizing: border-box; margin: 0; padding: 0; }
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+  background: var(--color-background);
+}