feat:@discord.js/type-utils package

[suneettipirneni]

Please describe the changes this PR makes and why it should be merged:

Migration of discordjs/discord.js#6410 to package here.

This package offers typeguards for otherwise tedious manual typeguards. It will also eventually offer compatibility with api types and #equals between various types.

Status and versioning classification:
Please move lines that apply to you out of the comment:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating

[codecov]

Codecov Report

Merging #57 (954d125) into main (ceaab7d) will increase coverage by 0.09%.
The diff coverage is 86.79%.

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
+ Coverage   85.84%   85.93%   +0.09%     
==========================================
  Files           8       11       +3     
  Lines         996     1102     +106     
  Branches       99      113      +14     
==========================================
+ Hits          855      947      +92     
  Misses         42       42              
- Partials       99      113      +14     

Impacted Files	Coverage Δ
packages/type-utils/src/lib/util/enum.ts	78.26% <78.26%> (ø)
packages/type-utils/src/lib/button.ts	82.35% <82.35%> (ø)
packages/type-utils/src/lib/command.ts	90.90% <90.90%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ceaab7d...954d125. Read the comment docs.

[suneettipirneni]

So I'm leaning towards renaming this module to type-utils, there are various reason for this:

1. This module only being for type guards feels a bit limited in scope.
2. Other utility functions such as #isEqual will offer a lot of utility and also fit under the type-utils category.
3. I eventually want to add support for all functions to accept discord-api-types variants as well as the d.js variants.

Other than naming, this PR won't change anything, but I wanna keep the door open for later changes.