Code cleanup, expand README, fix some minor bugs

[3vorp]

(from changelog, make sure to add the release number and date when this gets merged)

Added

• Exposed Collection.collectionName as a readonly property for TypeScript usage.
• TypeScript overview to the README.
• Optional replacement argument for array-splice edit fields.
• array-contains-none option for array fields.
• Optional constructor for the JSONDatabase PHP class to reduce repetitive code.
• "Advanced" section to the README for previously undocumented features.
• original option for readRaw to not insert ID fields, for easier non-relational collection usage.

Changed

• Rejected incorrect parameters are now TypeErrors instead of regular Errors.
• Deprecated firestorm.table(name) method, since firestorm.collection(name) does exactly the same thing.
• Reformatted the repository and improved README.md to make it easier to set up Firestorm.
• Clean up and standardize JSDoc comments.
• editField and editFieldBulk now return confirmations like all other write methods.
• editField and editFieldBulk now reject with a descriptive error message on failure rather than silently failing.

Fixed

• PHP-level errors not being rejected properly in GET requests.
• Certain write commands mutating data internally and affecting parameters outside Firestorm.
• Collection.searchKeys and Collection.values not returning proper Error objects sometimes.
• files.upload not allowing the form-data package's typing of FormData in TypeScript.
• Inconsistent use of indentation and formatting in PHP files.
• Various typos in PHP files.
• Collection class being exported in TypeScript despite the actual class being private.
• array-splice edit fields being incorrectly typed as array-slice.
• Platform-specific PHP error when searching nested keys.
• Collection.remove rejecting numeric keys, despite Collection.removeBulk not doing so.
• editField and editFieldBulk validation issues.

[TheRolfFR]

For real, what's the point of modifying my code, you're just modifying code to modify code.

It's useless, and you removed my sec function. Why, I don't know, but if I made it, it's so that I can modify the content later if needed

[3vorp]

I'm just trying to make the code cleaner, it was really inconsistent before and most of the changes are simply running a formatter and linter.