add medialess variant of markdown text

RichMessagesBot/src/main/kotlin/RichMessagesBot.kt

@@ -190,6 +190,102 @@ suspend fun main(vararg args: String) {
 
         </tg-slideshow>
     """.trimIndent()
+    val testMarkdownMediaLessText = """
+        **bold text**
+        __bold text__
+        *italic text*
+        _italic text_
+        ~~strikethrough text~~
+        `inline fixed-width code`
+        ==marked text==
+        ||spoiler||
+
+        [inline URL](https://t.me/)
+        [inline e-mail](mailto:user@example.com)
+        [inline phone number](tel:+123456789)
+        [inline mention of a user](tg://user?id=123456789)
+        ![👍](tg://emoji?id=5368324170671202286)
+        ![22:45 tomorrow](tg://time?unix=1647531900&format=wDT)
+        ${'$'}x^2 + y^2$
+        \#hashtag ${'$'}USD +12345678901, card: 4242 4242 4242 4242, https://t.me t.me a@t.me /command @username
+        all the text above was on the same line
+
+        # Heading 1
+        ## Heading 2
+        ### Heading 3
+        #### Heading 4
+        ##### Heading 5
+        ###### Heading 6
+
+        Paragraph text
+
+        ```python
+          print('pre-formatted fixed-width code block written in the Python programming language')
+        ```
+
+        ---
+
+        - unordered list item
+        * unordered list item
+        + unordered list item
+
+        1. ordered list item
+        2. ordered list item
+
+        - [ ] task list item
+        - [x] completed task list item
+
+        >Block quotation started
+        >
+        >Block quotation continued on the next line
+        >Block quotation continued on the same line
+        >
+        >The last line of the block quotation
+
+        | Header 1 | Header 2 |
+        |:---------|:--------:|
+        | left     | center   |
+
+        Text with a reference[^id1] and another one[^id2].
+
+        [^id1]: Definition of the first footnote.
+        [^id2]: Definition of the second footnote.
+
+        $${'$'}E = mc^2$$
+
+        ```math
+        E = mc^2
+        ```
+
+        ## Example Nested Syntax Report for _Q1_
+        Intro with <u>underlined text</u>, ==marked text==, and ${'$'}x^2 + y^2$.
+        **Bold _italic <u>underlined italic bold</u> italic_ bold**
+        <u>In inline tags, nested **markdown** is parsed</u>
+        >Quote with **bold text, ~~strikethrough, and <tg-spoiler>spoiler</tg-spoiler>~~**, plus [a link](https://t.me/).
+
+        - List item with `code`, <sup>superscript</sup>, <sub>subscript</sub>, and a footnote[^note]
+        - Another item with **bold <tg-spoiler><code>spoiler code</code></tg-spoiler>**
+        - Another item with ~~strikethrough and <ins>inserted text</ins>~~
+
+        | Metric | Value |
+        |:-------|------:|
+        | Speed  | **42** <sup>ms</sup> |
+        | Status | <tg-spoiler>ready</tg-spoiler> |
+
+        [^note]: Footnote with _italic text_ and <u>HTML underline</u>.
+
+        ---
+
+        # Details blocks can contain Markdown content:
+
+        <details open><summary>Summary with **bold text**</summary>
+
+        ### Details heading
+        - List item with _italic text_
+        - List item with <tg-spoiler>spoiler</tg-spoiler>
+
+        </details>
+    """.trimIndent()
 
     telegramBotWithBehaviourAndLongPolling(
         botToken,
@@ -304,6 +400,18 @@ suspend fun main(vararg args: String) {
             println(sent)
         }
 
+        // sendRichMessage with Markdown-formatted content
+        onCommand("rich_markdown_medialess") {
+            val sent = sendRichMessage(
+                it.chat.id,
+                // InputRichMessageMarkdown factory — content described using Markdown formatting
+                InputRichMessageMarkdown(
+                    testMarkdownMediaLessText
+                )
+            )
+            println(sent)
+        }
+
         // sendRichMessageDraft: stream partial rich messages sharing one draftId, then finalize
         // with a full sendRichMessage. Emulates streaming of an AI-generated reply.
         onCommand("rich_draft") {