Adds support for indenting pragmas with whitespace (#7185)

* feat: first pass at allowing pragmas to be indented

* Added documentation

editions/test/tiddlers/tests/data/macros/NestedMacros-indented.tid

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+title: Macros/NestedMacros-indented
+description: Nested Macros-indented
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
+title: Output
+
+\whitespace trim
+
+\define outer()
+	\whitespace trim
+
+	\define middle()
+		\whitespace trim
+
+		\define inner()
+			\whitespace trim
+
+			Jaguar
+
+		\end inner
+
+		<<inner>>
+
+	\end middle
+
+	<<middle>>
+
+\end outer
+
+<<outer>>
+
++
+title: ExpectedResult
+
+<p>Jaguar</p>

editions/test/tiddlers/tests/data/macros/NestedMacros-indented2.tid

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+title: Macros/NestedMacros-indented2
+description: Nested Macros-indented with spaces
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
+title: Output
+
+\whitespace trim
+
+\define outer()
+    \whitespace trim
+
+    \define middle()
+        \whitespace trim
+
+        \define inner()
+            \whitespace trim
+
+            Jaguar
+
+        \end inner
+
+        <<inner>>
+
+    \end middle
+
+    <<middle>>
+
+\end outer
+
+<<outer>>
+
++
+title: ExpectedResult
+
+<p>Jaguar</p>

editions/test/tiddlers/tests/data/pragmas/Parsermode-indented.tid

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+title: Pragmas/Parsermode-indented
+description: parsermode pragma
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
+title: Output
+
+{{AlwaysInline}}
+
+{{AlwaysBlock}}
+
+{{AlwaysInline}}{{AlwaysBlock}}
+
++
+title: AlwaysInline
+
+	\parsermode inline
+! Not Heading
+
+Text with ''bold''
++
+title: AlwaysBlock
+
+    \parsermode block
+! Heading
+
+Text with ''bold''
++
+title: ExpectedResult
+
+! Not Heading
+
+Text with <strong>bold</strong><h1 class="">Heading</h1><p>Text with <strong>bold</strong></p><p>! Not Heading
+
+Text with <strong>bold</strong><h1 class="">Heading</h1><p>Text with <strong>bold</strong></p>
+</p>