DOCS: Add AutoTX to gallery

[rihp]

Why are these changes needed?

AutoTx uses Autogen to generate crypto transactions for users, you can read the full article here: https://blog.polywrap.io/p/autotx-your-ai-powered-transaction

@sonichi suggested adding to gallery, see the discord message : https://discord.com/channels/1153072414184452236/1157447399044821132/1229436943117324390

Related issue number

N/A

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[Hk669]

looks good to me.

[Hk669]

@rihp reply to this for approving your PR. Thanks

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[Hk669]

requested tag changes are addressed in this commit. the tags look relevant.

[krishnashed]

The required changes were made!

[giorgossideris]

looks good!