casing convension

Summary:
[eslint-typescript/naming-convension rule docs](https://typescript-eslint.io/rules/naming-convention/)

Initially looked into it to enforce UPPER_CASE for top most constants like `const DELAY = 10` which is a standard in js ecosystem, which turned to be more difficuilt(we will still get there).

Turns out we had casing checks disabled for everything but typeLike names. What I did in this diff

- use default setting for eslint rule
    `✖ 9890 problems`
- with any propery names
    `✖ 8229 problems`
- without checking properies at all
    `✖ 3683 problems`
- without checking enum members
    `✖ 3231 problems`
- without checking object properties/methods
    `✖ 2978 problems`
- allowing PascalCase for variables
    `✖ 1657 problems
- allowing PascalCase for functions
    `✖ 975 problems
- not checking typeMethod and parameters
    `✖ 916 problems`
- allow double underscore before after variable
    `✖ 461 problems`
- allow snake_case variables
    `✖ 49 problems`

Fix remaining problems.

Future plans. Ban usage of PascalCase for variables that are not components

Reviewed By: LukeDefeo

Differential Revision: D50970193

fbshipit-source-id: d9f3abe6b02c9f7822598c8fa5382f58d067f70e

desktop/flipper-server-companion/src/globalsReplacements/fakeReactDOM.tsx

@@ -7,6 +7,7 @@
  * @format
  */
 
+// eslint-disable-next-line @typescript-eslint/naming-convention
 export const unstable_batchedUpdates = (cb: () => void) => {
   return cb();
 };