fix(cli): Allow negative expressions in extend-exclude

[epage]

This allows you to do

[files]
extend-exclude = [
    "*",
    "!checked/",
    "!checked/**",
]

I'm concerned that I didn't need to change the --force-exclude logic. If I do, tests fail.

Fixes #1099

[coveralls]

Pull Request Test Coverage Report for Build 10890169981

Details

• 0 of 14 (0.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 22.799%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/typos-cli/src/bin/typos-cli/main.rs	0	14	0.0%

Files with Coverage Reduction	New Missed Lines	%
crates/typos-cli/src/bin/typos-cli/main.rs	2	0.0%

Totals
Change from base Build 10704630854:	-0.1%
Covered Lines:	536
Relevant Lines:	2351

---

💛 - Coveralls