Add release instructions

Add RELEASE.md with release intructions

Signed-off-by: Jorge Prendes <jorge.prendes@gmail.com>

Author: jprendes

RELEASE.md

@@ -0,0 +1,27 @@
+# Release Process
+
+This document describes the steps to release a new version of the crate or wasi-demo-app images.
+
+## Crate Release Process
+
+### Release Steps
+
+1. Bump package and dependency versions in:
+   * `./compiler/Cargo.toml`: Bump the package version as needed.
+   * `./ttrpc-codegen/Cargo.toml`: Bump the package version as needed.
+   * `./Cargo.toml`: Bump package version as needed. Then bump the workspace dependencies version to match the respective crates versions.
+2. Commit the changes and get them merged in the repo.
+2. Dry run the `cargo publish` command as follow
+   ```bash
+   cargo +nightly publish \
+     -Z package-workspace \
+     --dry-run \
+     --locked \
+     -p ttrpc \
+     -p ttrpc-codegen \
+     -p ttrpc-compiler
+   ```
+2. If the dry run succeeds, publish the crates that need publishing using `cargo publihs -p <crate>` in the following order
+   1. `ttrpc-compiler`
+   2. `ttrpc-codegen`
+   3. `ttrpc`