chore(master): release 1.8.0

[wsdjeg]

🤖 I have created a release beep boop

1.8.0 (2026-07-24)

Features

• filter: add async filter using Lua coroutines (0a95cca)
• make window border configurable (b63e2b2)
• picker custom layouts (ed133eb)

Bug Fixes

• add missing preview_win property to async_files source (52f0a4b)
• add nil checks for source.filter_items and filter_count (5740e79)
• check buf and win is valid (0466fd4)
• disable list option in picker windows (d4639b9)
• improve stability and bounds checking (4065854)
• massively improve annotations, optimized code portions (#16) (470a98c)
• restore colorscheme when canceling colorscheme picker (#18) (d8fe93e)
• sources: require('picker').open() without args triggers error (f76ab25)
• windows: use vim.schedule for entering insert mode (76a495c)

Code Refactoring

• matchers: unify matcher interface with shared base module (d7ad008)

Performance Improvements

• matchers: add FFI acceleration for fzy compute() (66e983c)

Documentation

• add AGENTS.md for AI assistant guide (7d090ff)
• complete builtin sources table in README (1326b22)
• fix typo in doc (0552be6)
• help: format help file (470e033)
• update third-party-sources (2e7dc88)

Tests

• add sources registry module tests (fdc51cc)
• add test coverage for matchers init, main module, and 7 sources (b1a664d)
• add test infrastructure and Makefile (bbbb4d2)
• fix config and fzy test assertions (06b835a)
• matchers: add levenshtein matcher tests (34f3923)
• matchers: add matchfuzzy matcher tests (2a1c12a)
• sources: add buffers source tests (f7a8467)
• sources: add cmd_history source tests (a06caba)
• sources: add colorscheme source tests (b1ab448)
• sources: add highlights source tests (e461015)
• sources: add lines source tests (b13b0d6)
• sources: add picker_config source tests (e72c21f)
• sources: add registers source tests (c2611cb)
• sources: add search_history source tests (d97c39b)
• util: add util module tests (50af85e)

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