Replace GORM with bbolt for database operations

Migrated from GORM to bbolt for lightweight key-value storage, better aligning with project requirements. Updated repository methods to utilize bbolt's native APIs and removed dependencies associated with GORM.

go.mod

@@ -1,15 +1,18 @@
 module git.kor-elf.net/kor-elf/gui-for-ffmpeg
 
-go 1.21
+go 1.23
+
+toolchain go1.23.9
 
 require (
 	fyne.io/fyne/v2 v2.4.3
 	github.com/BurntSushi/toml v1.3.2
 	github.com/mattn/go-sqlite3 v1.14.21
 	github.com/nicksnyder/go-i18n/v2 v2.4.0
+	github.com/ulikunitz/xz v0.5.12
+	go.etcd.io/bbolt v1.4.0
+	golang.org/x/image v0.11.0
 	golang.org/x/text v0.14.0
-	gorm.io/driver/sqlite v1.5.4
-	gorm.io/gorm v1.25.6
 )
 
 require (
@@ -26,20 +29,16 @@ require (
 	github.com/go-text/typesetting v0.0.0-20230616162802-9c17dd34aa4a // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
 	github.com/gopherjs/gopherjs v1.17.2 // indirect
-	github.com/jinzhu/inflection v1.0.0 // indirect
-	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/jsummers/gobmp v0.0.0-20151104160322-e2ba15ffa76e // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
 	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
+	github.com/stretchr/testify v1.10.0 // indirect
 	github.com/tevino/abool v1.2.0 // indirect
-	github.com/ulikunitz/xz v0.5.12 // indirect
 	github.com/yuin/goldmark v1.5.5 // indirect
-	golang.org/x/image v0.11.0 // indirect
 	golang.org/x/mobile v0.0.0-20230531173138-3c911d8e3eda // indirect
 	golang.org/x/net v0.20.0 // indirect
-	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	honnef.co/go/js/dom v0.0.0-20210725211120-f030747120f2 // indirect
 )