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/.eslintrc.js

@@ -214,11 +214,35 @@ module.exports = {
         ],
         '@typescript-eslint/naming-convention': [
           2,
+          {
+            selector: 'default',
+            format: ['camelCase'],
+            leadingUnderscore: 'allow',
+            trailingUnderscore: 'allow',
+          },
+          {
+            selector: 'variable',
+            format: ['camelCase', 'UPPER_CASE', 'PascalCase', 'snake_case'],
+            leadingUnderscore: 'allowSingleOrDouble',
+            trailingUnderscore: 'allowSingleOrDouble',
+          },
+          {
+            selector: 'function',
+            format: ['camelCase', 'PascalCase'],
+            leadingUnderscore: 'allow',
+            trailingUnderscore: 'allow',
+          },
           {
             selector: 'typeLike',
             format: ['PascalCase', 'UPPER_CASE'],
             leadingUnderscore: 'allow',
           },
+          {
+            selector: ['property', 'method', 'memberLike', 'parameter'],
+            // do not enforce naming convention for properties
+            // no support for kebab-case
+            format: null,
+          },
         ],
         '@typescript-eslint/no-non-null-assertion': 'warn',
       },