Add CHANGELOG

[bessman]

Summary by Sourcery

Chores:

• Add a changelog file to track changes in the project.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a CHANGELOG file to track changes made to the project. The file includes entries for versions 3.1.0 and 3.1.1, outlining changes made in each version such as raising a RuntimeError under specific conditions and fixing an issue that made the I2C bus unusable after a device scan.

Sequence diagram for I2C peripheral start behavior

sequenceDiagram
    participant Client
    participant I2CPrimitive
    Note over I2CPrimitive: New behavior in 3.1.1
    Client->>I2CPrimitive: _start()
    alt peripheral is already active
        I2CPrimitive-->>Client: raise RuntimeError
    else peripheral is inactive
        I2CPrimitive-->>Client: start peripheral
    end

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Sequence diagram for I2C bus device scan fix

sequenceDiagram
    participant Client
    participant I2CBus
    Note over I2CBus: Fixed in 3.1.1
    Client->>I2CBus: scan devices
    I2CBus-->>Client: return device list
    Note over I2CBus: Bus remains usable
    Client->>I2CBus: subsequent operations
    I2CBus-->>Client: normal operation

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File-Level Changes

Change	Details	Files
Add a CHANGELOG file.	Created a new CHANGELOG file. Added version 3.1.1 and 3.1.0 entries. Included specific changes for each version like raising RuntimeError and fixing I2C bus issues.	CHANGELOG.md

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[sourcery-ai]

Hey @bessman - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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