More doc placeholders (#8523)

* Move cmake and faq docs to new location

* Rename CMake build to Building from Source

Author: GregoryComer

docs/source/index.rst

@@ -93,6 +93,8 @@ Topics in this section will help you get started with ExecuTorch.
    using-executorch-ios
    using-executorch-cpp
    using-executorch-troubleshooting
+   using-executorch-faqs
+   using-executorch-building-from-source
 
 .. toctree::
    :glob:

docs/source/runtime-build-and-cross-compilation.md renamed to docs/source/using-executorch-building-from-source.md

@@ -1,6 +1,6 @@
-# Building with CMake
+# Building from Source
 
-ExecuTorch uses [CMake](https://cmake.org/)  as its primary build system.
+ExecuTorch uses [CMake](https://cmake.org/) as the primary build system.
 Even if you don't use CMake directly, CMake can emit scripts for other format
 like Make, Ninja or Xcode. For information, see [cmake-generators(7)](https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html).
 

docs/source/getting-started-faqs.md renamed to docs/source/using-executorch-faqs.md

@@ -1,4 +1,4 @@
-# FAQs and Common Issues
+# Frequently Asked Questions
 
 This page summarizes frequently asked questions and provides guidance on issues that commonly occur when adopting ExecuTorch.
 

docs/source/using-executorch-troubleshooting.md

@@ -1,3 +1,3 @@
-# Troubleshooting, Profiling, and Optimization
+# Profiling and Debugging
 
 Placeholder for top-level troubleshooting, profiling, and devtool docs