feat(docs): add more detailed documentation on Transaction Builder

[martinserts]

Description

Updates documentation with more details regarding Transaction Builder.

Motivation and Context

The existing documentation was a bit lacking.

How Has This Been Tested?

The documentation site was tested locally:

$ pnpm install
$ moon tari-docs:build
$ moon tari-docs:serve
tari-docs:build | > tari-docs@0.0.1 build /Users/martinserts/Projects/Tari/tari.js.martins/docusaurus/tari-docs
tari-docs:build | > docusaurus build
tari-docs:build | 
tari-docs:build | [INFO] [en] Creating an optimized production build...
tari-docs:build | [webpackbar] ℹ Compiling Client
tari-docs:build | [webpackbar] ℹ Compiling Server
tari-docs:build | [webpackbar] ✔ Server: Compiled successfully in 7.23s
tari-docs:build | [webpackbar] ✔ Client: Compiled successfully in 10.33s
tari-docs:build | [SUCCESS] Generated static files in "build".
tari-docs:build | [INFO] Use `npm run serve` command to test your build locally.
▪▪▪▪ tari-docs:build (cached, ab3370e3)
▪▪▪▪ tari-docs:serve

> tari-docs@0.0.1 start /Users/martinserts/Projects/Tari/tari.js.martins/docusaurus/tari-docs
> docusaurus start

[INFO] Starting the development server...
[SUCCESS] Docusaurus website is running at: http://localhost:3000/tari.js/

✔ Client
  Compiled successfully in 787.16ms

client (webpack 5.98.0) compiled successfully

What process can a PR reviewer use to test or verify this change?

Start the documentation server as shown above.
Point the browser to: http://localhost:3000/tari.js/

Breaking Changes

• None
• Requires data directory on base node to be deleted
• Requires hard fork
• Other - Please specify