Updates dependencies and pre-commit hooks

Updates `pre-commit` hooks to the latest version and resolves
dependency issues by updating `poetry.lock` and
`package-lock.json`.

Renames and reorganizes character image files for better
organization and consistency. This includes deleting obsolete files
and changing file permissions for some images. A new
`requirements.txt` is added.

package-lock.json

@@ -118,9 +118,9 @@
 			}
 		},
 		"node_modules/browserslist": {
-			"version": "4.25.1",
-			"resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.25.1.tgz",
-			"integrity": "sha512-KGj0KoOMXLpSNkkEI6Z6mShmQy0bc1I+T7K9N81k4WWMrfz+6fQ6es80B/YLAeRoKvjYE1YSHHOW1qe9xIVzHw==",
+			"version": "4.25.2",
+			"resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.25.2.tgz",
+			"integrity": "sha512-0si2SJK3ooGzIawRu61ZdPCO1IncZwS8IzuX73sPZsXW6EQ/w/DAfPyKI8l1ETTCr2MnvqWitmlCUxgdul45jA==",
 			"funding": [
 				{
 					"type": "opencollective",
@@ -137,8 +137,8 @@
 			],
 			"license": "MIT",
 			"dependencies": {
-				"caniuse-lite": "^1.0.30001726",
-				"electron-to-chromium": "^1.5.173",
+				"caniuse-lite": "^1.0.30001733",
+				"electron-to-chromium": "^1.5.199",
 				"node-releases": "^2.0.19",
 				"update-browserslist-db": "^1.1.3"
 			},