Remove and simplify

[Zheoni]

This PR removes a bunch of dependencies and improves some things. Includes:

• Remove toml dep, now the bundled units, if enabled, are included from a compile time parse of the units.toml file. So a user of
  the library only has to include a toml parser if they want to customize the units. This also give faster start times.
• Remove url. This crate had a huge amount of dependencies and complexity. I'm sure there is a reason, but it's not
  needed here. I implemented a simpler way to check URLs.
• Remove pest. Now the aisle config format uses a manual parser. The format simple and the new parser pass all existing tests.
• Remove regex. Contributed a ton to file size and it was used in very few sites.
• Simplify quantity unit. Now the Unit is not stored, only the text. Maybe it's a bit slower to convert, but it's easier to use.

Breaking changes

• The INLINE_QUANTITIES extension now finds all quantities, not only temperatures. (new feature, but breaking)
• The Quantity and Unit api had some changes.

It includes some breaking changes specially for the unit thing.

After all of this, the examples/cook.rs in windows went down from 4 MB to 1.2M.

[Zheoni]

@dubadub just want to confirm you are ok with these breaking changes.

[dubadub]

Oh wow! that's impressive! I think wasm bin will be much smaller too. Thank you!