feat(heap-analysis) React component hook memory analysis

Summary:
This is the first iteration of a prototypical heap analysis for React components and hooks. The idea and outline of this analysis comes from the awesome tech talk by Giulio Zausa in React Berlin Day 2023.

For more technical details about how the analysis works, please check out the talk here:
https://portal.gitnation.org/contents/how-much-ram-is-your-usememo-using-lets-profile-it

To use this analysis, first take heap snapshot in Chrome DevTool and save the heap snapshot to disk (a `.heapsnapshot` file). Then use the following command to get memory stats of React components and hooks:
```
memlab analyze react-hooks --snapshot <path-to-snapshot-file>
```
This command also works for heap snapshots generated from MemLab run.

Differential Revision: D52858977

fbshipit-source-id: c4f1e072f5e770ea587e0b438a91e9a647307940

packages/core/src/lib/HeapAnalyzer.ts

@@ -519,13 +519,14 @@ class MemoryAnalyst {
   }
 
   public printHeapInfo(leakInfo: IOveralHeapInfo): void {
+    info.topLevel('Heap overall statistics:');
     Object.entries(leakInfo)
       .map(([k, v]) => [
-        utils.camelCaseToReadableString(k),
+        utils.camelCaseToReadableString(k, {capitalizeFirstWord: true}),
         utils.getReadableBytes(v),
       ])
       .forEach(([name, value]) => {
-        info.topLevel(`· ${name}: ${value}`);
+        info.topLevel(`  ${name}: ${value}`);
       });
   }
 

packages/core/src/lib/Utils.ts

@@ -1327,17 +1327,24 @@ async function closePuppeteer(
   }
 }
 
-function camelCaseToReadableString(str: string): string {
+function camelCaseToReadableString(
+  str: string,
+  options: {capitalizeFirstWord?: boolean} = {},
+): string {
   let ret = '';
+  const strToProcess = str.trim();
   const isUpperCase = (c: string) => /^[A-Z]$/.test(c);
-  for (const c of str) {
+  for (const c of strToProcess) {
     if (isUpperCase(c)) {
       ret += ret.length > 0 ? ' ' : '';
       ret += c.toLowerCase();
     } else {
       ret += c;
     }
   }
+  if (options.capitalizeFirstWord && ret.length > 0) {
+    ret = ret[0].toUpperCase() + ret.slice(1);
+  }
   return ret;
 }