[WIP] Add ability to set default row and column widths for sheets

[Copilot]

Coding agent has begun work on シートの行列幅のデフォルト設定方法 and will update this pull request as work progresses.

Original prompt

シートの行列幅を指定できる様にしてください
例えば

の様にしてデフォルトグローバルで指定します。

Conversation Summary

User Context:

• The current date is 2025年11月4日.
• The user is working on a file located at /Users/ryo/mysrc/github/ryo-arima/goxcel/.etc/sample.gxl.
• The repository in context is named goxcel, owned by ryo-arima, with the current and default branch being main.

User Request:

• The user requested the ability to specify the row and column widths for a sheet in a specific format. They provided an example:

  <Sheet name="Basic Features" col_width="1cm" row_heigh="1cm">

• The user aims to set these dimensions globally as defaults.

Recent Agent Commands/Tool Results:

• The agent has not executed any specific commands or tools in response to the user's request yet. The conversation has primarily focused on the user's request for functionality regarding sheet dimensions.

Active Work:

• The agent was preparing to address the user's request about specifying row and column widths in the sheet format when the token budget was exceeded.

Connection to User Goals:

• The user's goal is to enhance the functionality of their project by allowing for customizable sheet dimensions, which would improve usability and flexibility in their application. The agent's forthcoming actions would likely involve providing guidance on how to implement this feature in the codebase.
  TITLE: シートの行列幅のデフォルト設定方法

Created from VS Code via the GitHub Pull Request extension.

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