feat(durable): read returns images, optional Photon image processor

read returns an image file as one image block (programs get an ImageContent) plus an info diagnostic,
instead of an unsupported_image error. Limits are the conversation model's inputLimits.images.resize,
by default 2000x2000 pixels and 4.5 MB of base64.

- Without a processor: PNG, JPEG, GIF, and WebP within the limits pass through undecoded; the byte limit
  is checked before reading the file, dimensions from the header. Larger images and BMP are error results.
- With createCodingTools({ images }): the processor orients by EXIF, converts BMP to PNG, and shrinks to
  fit. ImageProcessor.prepare is async.
- @earendil-works/pi-durable/images: createPhotonImages(wasm) on @silvia-odwyer/photon 0.3.3 (web build);
  /images/node and /images/cloudflare load the wasm. The root and ./tools entries never reach it (enforced
  in check-entry-graphs).
- An image must be read whole: one that changes while read is read again, unlike a growing text file.
- A model without image input gets a diagnostic that it sees a placeholder.

packages/durable/package.json

@@ -30,6 +30,24 @@
 			"import": "./dist/tools/index.js",
 			"default": "./dist/tools/index.js"
 		},
+		"./images": {
+			"source": "./src/images/index.ts",
+			"types": "./dist/images/index.d.ts",
+			"import": "./dist/images/index.js",
+			"default": "./dist/images/index.js"
+		},
+		"./images/node": {
+			"source": "./src/images/node.ts",
+			"types": "./dist/images/node.d.ts",
+			"import": "./dist/images/node.js",
+			"default": "./dist/images/node.js"
+		},
+		"./images/cloudflare": {
+			"source": "./src/images/cloudflare.ts",
+			"types": "./dist/images/cloudflare.d.ts",
+			"import": "./dist/images/cloudflare.js",
+			"default": "./dist/images/cloudflare.js"
+		},
 		"./storage/memory": {
 			"source": "./src/storage/memory.ts",
 			"types": "./dist/storage/memory.d.ts",
@@ -110,6 +128,7 @@
 	"dependencies": {
 		"@earendil-works/chord": "^1.1.0",
 		"@earendil-works/pi-ai": "^1.1.0",
+		"@silvia-odwyer/photon": "0.3.3",
 		"diff": "8.0.4",
 		"typebox": "1.3.27"
 	},