[epaper_spi] Add SSD1677 and Seeed EE04 with Waveshare 4.26

[clydebarrow]

Description:

Related issue (if applicable): fixes

Pull request in esphome with YAML changes (if applicable):

• [epaper_spi] Add SSD1677 and Waveshare 4.26 esphome#11887

Checklist:

• I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
  or

• I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

• Link added in /components/index.rst when creating new documents for new components or cookbook.

New Component Images

If you are adding a new component to ESPHome, you can automatically generate a standardized black and white component name image for the documentation.

To generate a component image:

1. Comment on this pull request with the following command, replacing COMPONENT_NAME with your component name in UPPER_CASE format with underscores (e.g., BME280, SHT3X, DALLAS_TEMP):

   @esphomebot generate image COMPONENT_NAME
   

2. The ESPHome bot will respond with a downloadable ZIP file containing the SVG image.

3. Extract the SVG file and place it in the images/ folder of this repository.

4. Use the image in your component's index table entry in /components/index.rst.

Example: For a component called "DHT22 Temperature Sensor", use:

@esphomebot generate image DHT22

[Copilot]

Pull Request Overview

This PR adds documentation for two new display models (SSD1677 and Seeed EE04 with Waveshare 4.26" mono epaper) and documents two new configuration options for the ePaper SPI display component.

Key changes:

• Added two new display models to the supported displays table
• Documented the transform configuration option for advanced display transformations
• Documented the full_update_every configuration option for controlling partial update behavior

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[dhoeben]

Failed config

display.epaper_spi: [source common/display.yaml:2]
  
  'dimensions' is a required option for [display.epaper_spi].

You forgot to add these details in the config.