feat: add floating layout

[smnatale]

Description

When viewing review, open as floating window by default

Screenshots/Images

Summary by CodeRabbit

Release Notes

• New Features

  • Added configurable display layouts for review results: floating window or buffer view.
  • Introduced float customisation options for width, height, and border styling.

• Documentation

  • Updated :CodeRabbitShow command documentation to reflect new display mode flexibility.
  • Added comprehensive configuration guidance for the new show settings block.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5fecd23a-c6e2-413a-af9a-01def16955f0

📥 Commits

Reviewing files that changed from the base of the PR and between 22a83b6 and 470ff6c.

📒 Files selected for processing (1)

• lua/coderabbit/show.lua

📝 Walkthrough

Walkthrough

This PR introduces configurable display layouts for CodeRabbit review results. Users can now select between floating windows or buffer display via the show.layout configuration option, replacing the previous hardcoded vertical split behaviour. Float windows support customisation of width, height, and border style.

Changes

Cohort / File(s)	Summary
Documentation README.md, doc/coderabbit.txt	Updated command and configuration documentation to describe the new show configuration block and its layout options ("float" or "buffer"), with float-specific settings for width, height, and border.
Configuration Defaults lua/coderabbit/config.lua	Added new show configuration subtree with layout (default "float") and float options (width, height, border).
Display Implementation lua/coderabbit/show.lua	Introduced helper functions set_win_opts() and open_float() for window management, and open_window() to conditionally open floating or buffer display based on layout configuration. Refactored M.open to use these new functions and adjusted bufhidden behaviour per layout type.
Test Coverage tests/coderabbit/show_spec.lua	Added comprehensive test suite covering float layout creation, buffer layout in-place display, window configuration assertions, and default layout verification.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~23 minutes

Possibly related PRs

• PR #8: Directly modifies the show command implementation and buffer versus float window handling in lua/coderabbit/show.lua.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'feat: add floating layout' accurately captures the main change: introducing a floating window layout option for displaying CodeRabbit review results.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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[smnatale]

@coderabbitai review

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✅ Actions performed

Review triggered.

Note: CodeRabbit is an incremental review system and does not re-review already reviewed commits. This command is applicable only when automatic reviews are paused.

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@lua/coderabbit/show.lua`:
- Line 214: The existing branch that reuses an already-valid buffer calls
open_window(buf_id) but does not reapply window options, causing float windows
or buffer layouts to miss normalized settings; after calling open_window(buf_id)
(the same branch where you handle reopening a hidden buffer), call
set_win_opts(0) to reapply/normalize window options for the newly opened window
so float/config options like wrap and conceallevel are enforced consistently.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c56bc79f-5726-4043-b26e-b89f0b26481c

📥 Commits

Reviewing files that changed from the base of the PR and between ea3a4c0 and 22a83b6.

📒 Files selected for processing (5)

• README.md
• doc/coderabbit.txt
• lua/coderabbit/config.lua
• lua/coderabbit/show.lua
• tests/coderabbit/show_spec.lua