app picker: extend App Picker to integrate with mime overrides

- Adds "DMS Opener" as an option (dms-open.desktop)
- Add mime type GO utils
- Add rememberance to App Picker modal

core/internal/desktop/parser.go

@@ -0,0 +1,80 @@
+package desktop
+
+import (
+	"bufio"
+	"bytes"
+	"strings"
+)
+
+type group struct {
+	keys map[string]string
+}
+
+func parseGroups(data []byte) map[string]*group {
+	groups := make(map[string]*group)
+	var current *group
+
+	scanner := bufio.NewScanner(bytes.NewReader(data))
+	scanner.Buffer(make([]byte, 64*1024), 1024*1024)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || line[0] == '#' {
+			continue
+		}
+
+		if line[0] == '[' && strings.HasSuffix(line, "]") {
+			name := line[1 : len(line)-1]
+			g, ok := groups[name]
+			if !ok {
+				g = &group{keys: make(map[string]string)}
+				groups[name] = g
+			}
+			current = g
+			continue
+		}
+
+		if current == nil {
+			continue
+		}
+
+		eq := strings.IndexByte(line, '=')
+		if eq <= 0 {
+			continue
+		}
+
+		key := strings.TrimSpace(line[:eq])
+		if bracket := strings.IndexByte(key, '['); bracket > 0 {
+			key = key[:bracket]
+		}
+		if _, ok := current.keys[key]; ok {
+			continue
+		}
+		current.keys[key] = strings.TrimSpace(line[eq+1:])
+	}
+
+	return groups
+}
+
+func splitList(value string) []string {
+	if value == "" {
+		return nil
+	}
+	parts := strings.Split(value, ";")
+	out := make([]string, 0, len(parts))
+	for _, p := range parts {
+		p = strings.TrimSpace(p)
+		if p == "" {
+			continue
+		}
+		out = append(out, p)
+	}
+	return out
+}
+
+func parseBool(value string) bool {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "true", "1", "yes":
+		return true
+	}
+	return false
+}