fix: cli tool does not bundle template, but must read them

[CarsonRoscoe]

What changed?

• Bug fix

The pipx run create-onchain-template fails because the TEMPLATE_DIR the CLI was reading from is not bundled with the cli.

Temp fix is to read from github main directly. Fast follow with either:

1. Sticking to Github, start tagging releases better, and whenever we bump the CLI, we update the github tag we pull from to the one we're about to release.
2. Find a way to include the template in the cli build directly

Why was this change implemented?

CLI is not building, EthDenver starts today.

Checklist

• Changelog updated
• Commits are signed. See instructions
• Doc strings
• Readme updates
• Rebased against main
• Relevant exports added

How has it been tested?

• Agent tested
• Unit tests

Manually tested via deleting the local template directory to ensure it isn't reading that, and then running:

poetry install
poetry build
poetry run create-onchain-agent

Notes to reviewers

I want to discuss a better way to do this in a fast-follow. There is two flaws with this approach.

1. The CLI slows down slightly, since we're adding a download->extract->move folder to cache step during the CLI. It's faster than I expected, but still a consideration as the project/repo get bigger.
2. We risk the version of the CLI and the Template getting out of sync, if people are running a older CLI version and pulling newer templates.

[cb-heimdall]

✅ Heimdall Review Status

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Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1