Add CUDA compatibility changes

- fix Markdown linting errors
- Add words for Compatility
- Reformat code samples
- minor edit
- convert hip-changes from markdown to RST
- Add cpp links to reference content
- Update for Julia's comments
- add Leo's comments
- Clean up hipGetLastError

Author: randyh62

.wordlist.txt

@@ -41,7 +41,9 @@ Dereferencing
 DFT
 dll
 DirectX
+dst
 EIGEN
+elementSize
 enqueue
 enqueues
 entrypoint
@@ -69,14 +71,24 @@ hcBLAS
 HIP-Clang
 hipcc
 hipCtx
+hipError
+hipErrorContextIsDestroyed
+hipErrorInvalidHandle
 hipexamine
 hipExt
+hipGetLastError
 hipified
 HIPify
+hipMalloc
+hipMemsetParams
 hipModule
 hipModuleLaunchKernel
 hipother
+hipOutOfMemory
+hipRTC
 HIPRTC
+hipSetDevice
+hipSuccess
 hyperthreading
 icc
 IILE
@@ -122,7 +134,9 @@ NCCL
 NDRange
 nonnegative
 NOP
+NULLPTR
 Numa
+nvRTC
 ns
 Nsight
 ocp
@@ -168,6 +182,7 @@ sinf
 SOMA
 SPMV
 sr
+STL
 structs
 SYCL
 syntaxes
@@ -178,6 +193,7 @@ tradeoffs
 templated
 toolkits
 transfering
+typedef
 typedefs
 ULP
 ULPs