docs(README): add Neovim installation section with LuaRocks path setup and manual git methods

[Copilot]

• Add a new subsection "With Neovim" under the "📦 Installation" section
• Include installation instructions for popular Neovim package managers (lazy.nvim, packer.nvim, vim-plug)
• Add LuaRocks path configuration instructions for Neovim
• Include troubleshooting notes about Lua 5.1 compatibility
• Add manual installation methods using git clone and git submodule for Neovim
• Rename luarrow-repo to luarrow in manual installation examples
• Clarify LuaRocks path setup applies to package manager installs only
• Replace non-standard --lr-path/--lr-cpath flags with luarocks path parsing
• Add vim.fn.executable check and pcall(require) validation
• Fix unquoted LUA_PATH/LUA_CPATH regex fallback to match full line
• Add trim_trailing_separators helper
• Fix manual install src path to match main branch structure
• Use luarocks path --lua-version 5.1 for Neovim-compatible paths
• Raise a clear error when io.popen fails
• Use luarocks install --lua-version 5.1 in package manager build commands
• Capture pcall return value to avoid double-require
• Fix malformed closing fence `````` → ``` on the require('luarocks') snippet
• Fix code fence info string lua:luarocks.lua → lua for correct syntax highlighting
• Fix path typo ~/.config/nvim/l/ua/plugins.lua → ~/.config/nvim/lua/plugins.lua

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add a sub section to README.md for installing to Neovim</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

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• Fixes Add a sub section to README.md for installing to Neovim #22

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[Copilot]

Pull request overview

Adds Neovim-focused installation guidance to improve discoverability and onboarding for Neovim users who want to use luarrow from their editor config.

Changes:

• Introduces a new “With Neovim” subsection under Installation
• Adds example snippets for lazy.nvim, packer.nvim, and vim-plug
• Adds a short snippet showing require('luarrow') usage from a Neovim config

[aiya000]

@copilot apply changes based on the comments in this thread

[aiya000]

@copilot
As an additional method, I would like to show you how to add this repository to the .config/nvim/lua directory using git submodule add or git-clone.

[Copilot]

@copilot
As an additional method, I would like to show you how to add this repository to the .config/nvim/lua directory using git submodule add or git-clone.

Added a new "Manually (git clone or git submodule)" subsection under "With Neovim" in commit e666072. It shows both methods and includes the init.lua snippet to add the src directory to package.path so require('luarrow') works directly from the cloned repo.

[aiya000]

@copilot
As an additional method, I would like to show you how to add this repository to the .config/nvim/lua directory using git submodule add or git-clone.

Added a new "Manually (git clone or git submodule)" subsection under "With Neovim" in commit e666072. It shows both methods and includes the init.lua snippet to add the src directory to package.path so require('luarrow') works directly from the cloned repo.

@copilot
Nice! However, the name luarrow-repo might not be cool even as an example. I think simply luarrow would be fine.

[Copilot]

@copilot
As an additional method, I would like to show you how to add this repository to the .config/nvim/lua directory using git submodule add or git-clone.

...

Renamed luarrow-repo to luarrow in all three places (clone path, submodule path, and init.lua snippet) in commit c3aacea.

[Copilot]

@copilot apply changes based on the comments in this thread

Applied both changes from the review in commit 93e624d:

• luarocks path --lua-version 5.1 to ensure Lua 5.1 (Neovim/LuaJIT) compatible paths are returned
• io.popen failure now raises a descriptive error ('Failed to run "luarocks path": ...') instead of silently returning

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

[aiya000]

@copilot apply changes based on the comments in this thread

[Copilot]

@copilot apply changes based on the comments in this thread

Applied both changes from review #3869969712 in commit f5ba991:

• Package manager build commands now use luarocks install --lua-version 5.1 luarrow directly, ensuring the package lands in the Lua 5.1 tree that luarocks path --lua-version 5.1 exposes to Neovim
• pcall(require, 'luarrow') now captures the module as local ok, luarrow = pcall(...), and arrow/fun are read from luarrow.arrow/luarrow.fun — no double-require

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[aiya000]

TODO: Check on my Neovim

[aiya000]

Checked.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 5 comments.