…e README.md and modules correspondingly

Changes:

1. update README.md, replacing old names, reorganizing and updating its content, and fixing some formatting issues, typos, and grammar mistakes
1. rename the subjects/modules and adopt the "concatenated project name" approach
1. run `apiDump` and remove the old dumped files

A source commit: huanshankeji/kotlin-common@477978d

…mposeUi"/"ComposeUi" in files and filenames

To replace strings in the filenames, the "rename" program is installed and the following command is run:

```sh
find . -name "*androidxCommon*" -exec rename 's/androidxCommon/composeUi/' {} ";"
find . -name "*AndroidxCommon*" -exec rename 's/AndroidxCommon/ComposeUi/' {} ";"
```