Add dagger PBR textures, font import sidecars, migrate_shaders uid

- assets/props/dagger/dagger_Dagger_{BC,NM}.png + dagger_dagger_{E,ORM}.png:
  complete PBR texture set for the dagger prop.
- assets/fonts/MKX Title.ttf.import + kirsty/*.otf.import: Godot 4 import
  metadata sidecars for fonts whose source files were already tracked.
- scripts/migrate_shaders.gd.uid: UID sidecar missed in the previous
  migration commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

assets/fonts/kirsty/kirsty bd it.otf.import

@@ -0,0 +1,36 @@
+[remap]
+
+importer="font_data_dynamic"
+type="FontFile"
+uid="uid://c1wk0en7c3mpr"
+path="res://.godot/imported/kirsty bd it.otf-bc7aa29ac3e576434d66f4370e7210d1.fontdata"
+
+[deps]
+
+source_file="res://assets/fonts/kirsty/kirsty bd it.otf"
+dest_files=["res://.godot/imported/kirsty bd it.otf-bc7aa29ac3e576434d66f4370e7210d1.fontdata"]
+
+[params]
+
+Rendering=null
+antialiasing=1
+generate_mipmaps=false
+disable_embedded_bitmaps=true
+multichannel_signed_distance_field=false
+msdf_pixel_range=8
+msdf_size=48
+allow_system_fallback=true
+force_autohinter=false
+modulate_color_glyphs=false
+hinting=1
+subpixel_positioning=4
+keep_rounding_remainders=true
+oversampling=0.0
+Fallbacks=null
+fallbacks=[]
+Compress=null
+compress=true
+preload=[]
+language_support={}
+script_support={}
+opentype_features={}