feat: convert to an astro application (!9)

Reviewed-on: https://codeberg.org/nhcarrigan/docs/pulls/9
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/styles/style.css

@@ -0,0 +1,53 @@
+:root,
+:root[data-theme="light"] {
+  --primary-color: #04624f;
+  --background-color: #abfcecdd;
+}
+
+:root[data-theme="dark"] {
+  --background-color: #04624fdd;
+  --primary-color: #abfcec;
+}
+
+.main-frame::before {
+  background: url(https://cdn.nhcarrigan.com/background.png);
+  background-size: cover;
+  background-position: center;
+  width: 100%;
+  height: 100%;
+  z-index: -1;
+  content: "";
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  opacity: 1;
+  pointer-events: none;
+}
+
+.main-pane {
+  margin: auto;
+  background-color: var(--background-color);
+  color: var(--primary-color);
+}
+
+.sidebar-pane,
+.right-sidebar-panel {
+  background-color: var(--background-color);
+  color: var(--primary-color);
+}
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  color: var(--primary-color) !important;
+}
+
+header {
+  color: var(--primary-color) !important;
+  background-color: var(--background-color) !important;
+}