[J17] Add intermodule class loading example description

Author: temikfart

img/Java 17. Manual Loading (loading and loadable with dependency).jpg

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+## Java 17. Manual Loading (loading and loadable with dependency)
+---
+**Task:** load any application class from another module (modules are NOT linked through `module-info.java`) using a custom class loader (`CustomClassLoader`). A loadable class module has a dependency described via `module-info.java`.
+
+### Solution
+---
+Modules (declared via `module-info.java`):
+- `manual.fewmodules.separately.withdeps.loading`:
+    - [`Main`](loading/src/ru/ispras/j17/manual/fewmodules/separately/nodeps/loading/Main.java) - a class containing the `main` method, where an instance of the `CustomClassLoader` class is created, the `Cat` class is loaded using it, creating an instance of the class `Cat` and calling the `Cat::talk` method;
+    - [`CustomClassLoader`](loading/src/ru/ispras/j17/manual/fewmodules/separately/nodeps/loading/CustomClassLoader.java) - a class that is an implementation of a custom class loader;
+- `manual.fewmodules.separately.withdeps.loadable`:
+    - [`Cat`](loadable/src/ru/ispras/j17/manual/fewmodules/separately/nodeps/loadable/Cat.java) - loadable class with the `talk` method, which prints the string *"Meow"* to `stdout`;
+- `manual.fewmodules.separately.withdeps.dependency`:
+    - [Dog](dependency/src/ru/ispras/j17/manual/fewmodules/separately/withdeps/dependency/Dogjava) - used in the module `manual.fewmodules.separately.withdeps.loadable` class with a `talk` method that prints the string *"Woof"* to `stdout`.
+
+### Run
+---
+Using `modulepath`:
+
+```shell
+java17 -p . -m manual.fewmodules.separately.withdeps.loading
+```
+
+Output:
+
+```shell
+[loading] Main Class Module is module manual.fewmodules.separately.withdeps.loading
+[loading] Main Class ClassLoader is jdk.internal.loader.ClassLoaders$AppClassLoader@5c647e05
+ClassLoader for [loadable] module is jdk.internal.loader.Loader@30f39991
+[loadable] Main Class ClassLoader is jdk.internal.loader.Loader@30f39991
+[loadable] Cat Class ClassLoader is jdk.internal.loader.Loader@30f39991
+[dependency] Dog Class ClassLoader is jdk.internal.loader.Loader@30f39991
+[loadable] Main Class Module is module manual.fewmodules.separately.withdeps.loadable
+[loadable] Cat Class Module is module manual.fewmodules.separately.withdeps.loadable
+[dependency] Dog Class Module is module manual.fewmodules.separately.withdeps.dependency
+Meow
+Woof
+```
+
+### Explanation
+---
+![Java 17. Manual Loading (loading and loadable with dependency).jpg](../../../../../img/Java%2017.%20Manual%20Loading%20(loading%20and%20loadable%20with%20dependency).jpg)
+
+*Same as in [Java 17. Manual Loading (dependent and dependency)](https://github.com/temikfart/java-classloading/tree/main/java-17/manual/few-modules/together)*.