[code-reflection] RFR: Expand the example suite with Inlining and Bytecode generation

[Juan Fumero]

This PR extends the sample suite for learning code reflection.  It adds a couple of examples to learn how to apply inlining.
1. Inline values 
2. Inline new code-reflected methods after code transformations. 

In addition, it expands the examples to generate Java bytecode from code models. 

All examples have been documented. 

#### How to compile and run 


export JAVA_HOME=<jdk-babylon-build>
mvn clean package

java --enable-preview -cp target/crsamples-1.0-SNAPSHOT.jar oracle.code.samples.InlineExample
java --enable-preview -cp target/crsamples-1.0-SNAPSHOT.jar oracle.code.samples.MathOptimizerWithInlining

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Commit messages:
 - [samples] documentation added
 - [samples] Documentation added
 - Javadoc for new examples
 - Add missing examples
 - [samples] Two new examples to show how to inline

Changes: https://git.openjdk.org/babylon/pull/525/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=525&range=00
  Stats: 486 lines in 5 files changed: 475 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/babylon/pull/525.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/525/head:pull/525

PR: https://git.openjdk.org/babylon/pull/525