docs(all): Provide the boilerplate README for the package root

README.md

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+# WAL:E - Wallet Access Layer for EOS blockchain networks.
+
+[TODO: `lerna` monorepo note]
+
+[TODO: Description]
+
+
+## Quick start
+
+[TODO]
+
+
+## Guide
+
+[TODO]
+
+
+## API reference
+
+[TODO]
+
+
+## Contribution
+
+### Package development
+
+1.  Make sure you have [`yarn`](https://yarnpkg.com) installed.
+
+2.  Install the dependencies with
+
+        $ yarn install
+
+    **Note** that before `wal-eos`, `wal-eos-scatter-provider` and `wal-eos-stub-provider` are published, they are managed by `lerna` along with packages themselves. That means, before running the examples, `lerna` should wire up all the dependencies and instead of running `yarn install` manually from this folder, the following commands should be run from the project root:
+
+3.  Bootstrap the dependencies with
+
+        $ yarn bootstrap
+
+    This will make `lerna` install all the necessary dependencies for managed packages.
+
+4.  Proceed with the development of a certain package (each package has its own set of commands to assist the development and build process).
+
+
+### Builds
+
+To build all packages simultaneously, run the following command from the project root:
+
+        $ yarn build-packages
+
+This will perform both TypeScript compilation into `lib` folder and a minified production-ready UMD build into `umd` folder for each managed package.