feat: added captions, plain_text() method for RichText

fix: disabled certain properties that caused problems during parsing

src/lib.rs

@@ -1114,7 +1114,7 @@ pub struct QueryResponse<T> {
     pub has_more: Option<bool>,
     pub next_cursor: Option<String>,
     pub results: Vec<T>,
-    pub page_or_database: Value,
+    // pub page_or_database: Value,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
@@ -1501,6 +1501,19 @@ pub enum RichText {
     Unsupported,
 }
 
+impl RichText {
+    pub fn plain_text(&self) -> String {
+        use RichText::*;
+        match self {
+            Text { plain_text, .. } | Mention { plain_text, .. } | Equation { plain_text, .. } => {
+                plain_text
+            }
+            Unsupported => "",
+        }
+        .to_string()
+    }
+}
+
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
 pub struct Text {
     pub content: String,
@@ -1687,6 +1700,7 @@ pub enum File {
     },
     External {
         external: ExternalFile,
+        caption: Option<Vec<RichText>>,
     },
 
     #[serde(other)]