feat(recipes): add harpoon-bufsync recipe

[p0uyaDev]

📑 Description

Adds a new recipe that syncs AstroNvim's Heirline tabline buffer order with Harpoon v2 marks.

Harpoon lets you pin frequently-used files for quick navigation, but the tabline doesn't reflect Harpoon's order — it tracks buffers by open-time and internal buffer ID. With a single keybind (<Leader>bsh), this recipe:

• Closes buffers not in your Harpoon list
• Opens Harpoon-marked files that aren't open yet
• Sorts the tabline buffer order to match your Harpoon mark order
• Redraws the tabline

📖 Additional Information

Requirements:

• Harpoon v2 (harpoon2 branch)
• AstroCore (bundled with AstroNvim)

Caveats:

• Only affects the current tab
• Non-existent file paths in Harpoon are skipped (not opened)
• Unsaved buffers in the non-Harpoon set will be closed — save before syncing

Files:

• lua/astrocommunity/recipes/harpoon-bufsync/init.lua
• lua/astrocommunity/recipes/harpoon-bufsync/README.md

[github-actions]

Review Checklist

Does this PR follow the [Contribution Guidelines](development guidelines)? Following is a partial checklist:

Proper conventional commit scoping:

• If you are adding a new plugin, the scope would be the name of the category it is being added into. ex. feat(utility): added noice.nvim plugin

• If you are modifying a pre-existing plugin or pack, the scope would be the name of the plugin folder. ex. fix(noice-nvim): fix LSP handler error

• Pull request title has the appropriate conventional commit type and scope where the scope is the name of the pre-existing directory in the project as described above

• README is properly formatted and uses fenced in links with <url> unless they are inside a [title](url)

• Entry returns a single plugin spec with the new plugin as the only top level spec (not applicable for recipes or packs).

• Proper usage of opts table rather than setting things up with the config function.

• Proper usage of specs table for all specs that are not dependencies of a given plugin (not applicable for recipes or packs).