feat(completion): replace orderless with fussy

Use fussy instead of orderless for filtering and scoring/ordering
completion candidates. This seems to overall order results in a much
better way than just orderless.

Technically orderless is still used to filter the candidate list, but
fzf-native is used to score/order the results.

core/siren-core-modules.el

@@ -52,7 +52,7 @@
 
 ;; Completion Systems and Interfaces
 (require 'siren-vertico)
-(require 'siren-orderless)
+(require 'siren-fussy)
 
 ;; Linting
 (require 'siren-flycheck)

modules/editor/siren-fussy.el

@@ -0,0 +1,42 @@
+;;; siren-fussy.el --- jimeh's Emacs Siren: fussy configuration.
+
+;;; Commentary:
+
+;; Basic configuration for fussy.
+
+;;; Code:
+
+(use-package fussy
+  :ensure t
+  :custom
+  (completion-category-overrides nil)
+  (completion-ignore-case t)
+  (pcomplete-ignore-case t)
+
+  (fussy-ignore-case t)
+  (fussy-filter-fn 'fussy-filter-orderless-flex)
+  (fussy-score-fn 'fussy-fzf-native-score)
+
+  :preface
+  (defun siren-fussy--company-transform-advice (f &rest args)
+    "Manage `company-transformers'."
+    (let ((company-transformers '(fussy-company-sort-by-completion-score)))
+      (apply f args)))
+
+  :config
+  (add-to-list 'completion-styles 'fussy)
+  (advice-add 'company--transform-candidates
+              :around 'siren-fussy--company-transform-advice)
+  (setq completion-category-defaults nil))
+
+(use-package orderless
+  :commands (orderless-filter))
+
+(use-package fzf-native
+  :straight (fzf-native :repo "dangduc/fzf-native" :host github
+                        :files (:defaults "bin"))
+  :config
+  (fzf-native-load-dyn))
+
+(provide 'siren-fussy)
+;;; siren-fussy.el ends here

straight/versions/default.el

@@ -77,6 +77,8 @@
  ("flyspell-correct" . "7d7b6b01188bd28e20a13736ac9f36c3367bd16e")
  ("forge" . "05babf69068de7a982bd2e8ad888f37dc7319003")
  ("frame-local" . "7ee1106c3bcd4022f48421f8cb1ef4f995da816e")
+ ("fussy" . "1e77aa133b1bed8164a927b9090af839d0383774")
+ ("fzf-native" . "8fc9f7e207e2610434745c37b3953f577d257728")
  ("gcmh" . "0089f9c3a6d4e9a310d0791cf6fa8f35642ecfd9")
  ("general.el" . "9651024e7f40a8ac5c3f31f8675d3ebe2b667344")
  ("gh-notify" . "aa4d8bc0c56366d437e7c126e7eedc5938109342")