feat: add avalanche plugin

[snow-farmer]

Relates to:

n/a

Risks

Low

Background

What does this PR do?

This PR integrates a plugin intended for the Avalanche C-Chain which includes onchain defi actions.

• Transfer native asset
• Transfer ERC20 tokens
• Swap ERC20 tokens
• Deposit ERC20 tokens to yield strategies
• Creates new tokens on token launchpad

What kind of change is this?

Features (non-breaking change which adds functionality)

Why are we doing this? Any context or related work?

Enable onchain actions for Avalanche C-Chain with dedicated plugin.

Documentation changes needed?

My changes do not require a change to the project documentation.

Testing

Where should a reviewer start?

1. Go to plugin-avalanche

Detailed testing steps

1. add PRIVATE_KEY_AVALANCHE to .env
2. fund account with AVAX for gas and tokens for testing
3. ask agent to swap tokens, transfer tokens, and deposit tokens for yield.

Discord username

real_yakman