Bringing back the git rev hash to Cargo.toml of each project

[anupsdf]

What

Bringing back the git rev hash to Cargo.toml of each project

Why

This was unintentionally removed with PR 232 when moving away from workspace (with each example being a member project) to individual sub directory projects without top level workspace.

Scripts used

1. Search and replace

find . -maxdepth 3 -type f -name Cargo.toml | xargs sed -i'' -e 's/version = "0.7.0"/version = "0.7.0", git = "https:\/\/github.com\/stellar\/rs-soroban-sdk", rev = "29b505cf95f2fd4fbe639fdb163b606c44920837"/g'

2. Add to git

find . -maxdepth 3 -type f -name Cargo.toml | xargs git add 

3. Clean up backup from sed command

git clean -f -x *

4. Commit and push,

git commit -m "Bringing back the git rev hash to Cargo.toml of each project"
git push