Update code metrics badges [skip ci]

code-files.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="92" height="20" role="img" aria-label="code files: 24">
+<title>code files: 24</title>
+<rect width="70" height="20" fill="#555555"/>
+<rect x="70" width="22" height="20" fill="#007ec6"/>
+<g font-family="Verdana,Geneva,DejaVu Sans,sans-serif" font-size="11" text-anchor="middle">
+<text x="35" y="14" fill="#ffffff">code files</text>
+<text x="81" y="14" fill="#000000">24</text>
+</g>
+</svg>

code-lines.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="20" role="img" aria-label="lines of code: 5,265">
+<title>lines of code: 5,265</title>
+<rect width="88" height="20" fill="#555555"/>
+<rect x="88" width="40" height="20" fill="#007ec6"/>
+<g font-family="Verdana,Geneva,DejaVu Sans,sans-serif" font-size="11" text-anchor="middle">
+<text x="44" y="14" fill="#ffffff">lines of code</text>
+<text x="108" y="14" fill="#000000">5,265</text>
+</g>
+</svg>

code-metrics.json

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+{
+  "blank": 1009,
+  "comment": 81,
+  "files": 24,
+  "languages": {
+    "Python": {
+      "blank": 968,
+      "comment": 13,
+      "files": 20,
+      "lines": 4828
+    },
+    "Shell": {
+      "blank": 41,
+      "comment": 68,
+      "files": 4,
+      "lines": 437
+    }
+  },
+  "lines": 5265
+}