[lldb/docs] Add section links to the top of the GDB to LLDB command map

Add section links to the top of the GDB to LLDB command map. This makes
navigating the page easier.

Author: JDevlieghere

lldb/docs/use/map.rst

@@ -6,6 +6,15 @@ GDB-compatibility aliases in LLDB are also listed. The full lldb command names
 are often long, but any unique short form can be used. Instead of "**breakpoint
 set**", "**br se**" is also acceptable.
 
+* `Execution Commands`_
+* `Breakpoint Commands`_
+* `Watchpoint Commands`_
+* `Examining Variables`_
+* `Evaluating Expressions`_
+* `Examining Thread State`_
+* `Executable and Shared Library Query Commands`_
+* `Miscellaneous`_
+
 Execution Commands
 ------------------