[WEB-480] fix: code block paste from VSCode and indentation

[Palanikannan1437]

Description

This PR intends to add proper copy pasting behaviour of content copied from VSCode into our editor into a code block, while handling vaaarious scenarios...

1. If copied code from VSCode is pasted into a inline code block, it stays an inline code block
2. If cursor is at an empty node, then the copied code from VSCode will be converted into a code block and the code block is inserted into the current line itself
3. If cursor is not in an empty node, then the copied code from VSCode will be converted into a code block and the code block is inserted into the next line

Some more improvements w.r.t to toggling code blocks,

1. When you toggle a codeBlock, the formatting along with the indentation is maintained by the following parsing logic

      const lines = textContent.split(/\r?\n/);
      const parsedContent = lines.map((line) => `<p>${line.replace(/ /g, "&nbsp;")}</p>`).join("");

2. When you select a bunch of lines and hit toggle code button from menubar, then it'll turn into a codeBlock instead of inline code.
3. From within a code block, if you click toggle, then with all the indentation as is and line breaks, it'll be turned into normal paragraphs.
4. If you select a single line/word and press toggle, then the text is wrapped around by inline code block....